This patch adds a missing V8_EXPORT to Context::BackupIncumbentScope.

Bug: 
Cq-Include-Trybots: master.tryserver.chromium.linux:linux_chromium_rel_ng
Change-Id: Ic4146ee1dad2f84222671fc54b4a463282356417
Reviewed-on: https://chromium-review.googlesource.com/762834Reviewed-by: Adam Klein <adamk@chromium.org>
Commit-Queue: Yuki Shiino <yukishiino@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49316}

Revert this and its follow-up as suspect for current canary OOM crasher.

This reverts commit 4899bcb6.
This reverts commit b73ee334.

TBR=adamk@chromium.org,hpayer@chromium.org

Bug: chromium:783708
Cq-Include-Trybots: master.tryserver.chromium.linux:linux_chromium_rel_ng
Change-Id: I4c00582e7ab2df22216ad6732e2843e9958db0c0
Reviewed-on: https://chromium-review.googlesource.com/765447Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Bill Budge <bbudge@chromium.org>
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49315}

This is a reland of 6f890fd5
Original change's description:
> Ship RegExp Unicode property escapes
>
> Intent to ship:
> https://groups.google.com/d/msg/v8-users/isa2JrstEbE/i6UvFO7RBwAJ
>
> BUG=v8:4743
>
> Change-Id: I62cdc6fa1f114fc8be26c5cf354c45a15ce49ab7
> Reviewed-on: https://chromium-review.googlesource.com/761776
> Reviewed-by: Adam Klein <adamk@chromium.org>
> Commit-Queue: Mathias Bynens <mathias@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#49312}

Bug: v8:4743
Change-Id: I6618242b147472a9a083573299ed3b3dda5ac6ed
Reviewed-on: https://chromium-review.googlesource.com/764908Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Mathias Bynens <mathias@chromium.org>
Commit-Queue: Mathias Bynens <mathias@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49314}

This reverts commit 6f890fd5.

Reason for revert: Breaks layout test:
https://build.chromium.org/p/client.v8.fyi/builders/V8-Blink%20Linux%2064/builds/19671

https://github.com/v8/v8/wiki/Blink-layout-tests

Original change's description:
> Ship RegExp Unicode property escapes
> 
> Intent to ship:
> https://groups.google.com/d/msg/v8-users/isa2JrstEbE/i6UvFO7RBwAJ
> 
> BUG=v8:4743
> 
> Change-Id: I62cdc6fa1f114fc8be26c5cf354c45a15ce49ab7
> Reviewed-on: https://chromium-review.googlesource.com/761776
> Reviewed-by: Adam Klein <adamk@chromium.org>
> Commit-Queue: Mathias Bynens <mathias@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#49312}

TBR=adamk@chromium.org,yangguo@chromium.org,mathias@chromium.org

Change-Id: I5e09070582cf247f61429a1d45ae5faa3d21518e
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:4743
Reviewed-on: https://chromium-review.googlesource.com/765348Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49313}

Intent to ship:
https://groups.google.com/d/msg/v8-users/isa2JrstEbE/i6UvFO7RBwAJ

BUG=v8:4743

Change-Id: I62cdc6fa1f114fc8be26c5cf354c45a15ce49ab7
Reviewed-on: https://chromium-review.googlesource.com/761776Reviewed-by: Adam Klein <adamk@chromium.org>
Commit-Queue: Mathias Bynens <mathias@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49312}

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/3dd2b5f..98bbbff

Rolling v8/third_party/android_tools: https://chromium.googlesource.com/android_tools/+log/4a9623a..9914c57

Rolling v8/third_party/catapult: https://chromium.googlesource.com/catapult/+log/f83c79a..aee17a9

TBR=machenbach@chromium.org,hablich@chromium.org,sergiyb@chromium.org

Change-Id: Ie699606b3a50ce4bb49d2aa10f0238834d4fb355
Reviewed-on: https://chromium-review.googlesource.com/764672Reviewed-by: v8 autoroll <v8-autoroll@chromium.org>
Commit-Queue: v8 autoroll <v8-autoroll@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49311}

This is meant to be used from the native wasm datastructures

Bug: v8:6876
Change-Id: Ie865cf3277b24f25e1845bf32837be1a24047472
Reviewed-on: https://chromium-review.googlesource.com/764502
Commit-Queue: Mircea Trofin <mtrofin@chromium.org>
Reviewed-by: Ben Titzer <titzer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49310}

And add a watchlist for the C++ API.

Change-Id: Id82d7191153afe701fc11958ba36ce7a8b29bef2
Reviewed-on: https://chromium-review.googlesource.com/764548Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49309}

R=littledan@chromium.org, adamk@chromium.org

Bug: v8:5244
Change-Id: I1186601bc05bd5348acb4b0e1242d7d074020ad9
Reviewed-on: https://chromium-review.googlesource.com/757564Reviewed-by: Adam Klein <adamk@chromium.org>
Reviewed-by: Daniel Ehrenberg <littledan@chromium.org>
Commit-Queue: Josh Wolfe <jwolfe@igalia.com>
Cr-Commit-Position: refs/heads/master@{#49308}

This allows SafepointTables to be reused by the upcoming WasmCode
(wasm out of the GC heap), and integrate with the stack iterator.

Bug: v8:6876
Change-Id: I24ff78a073fa99aeabe12a0c5a12709f5b1461a2
Reviewed-on: https://chromium-review.googlesource.com/764370Reviewed-by: Brad Nelson <bradnelson@chromium.org>
Commit-Queue: Mircea Trofin <mtrofin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49307}

Turn cases where we are multiplying with a power of two into a left shift. We
hit this optimisation roughly 500 times in the snapshot.

Bug: 
Change-Id: Ibd3104a3dbe49f247a2d84db94891f6e3a897026
Reviewed-on: https://chromium-review.googlesource.com/763229Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Commit-Queue: Pierre Langlois <pierre.langlois@arm.com>
Cr-Commit-Position: refs/heads/master@{#49306}

- Eliminates OS::ReleaseRegion, replacing with calls to OS::Free.
- Adds bool return value to OS::Free.
- Cleans up types of flags, protection on Windows and Cygwin.

Bug: chromium:756050
Cq-Include-Trybots: master.tryserver.chromium.linux:linux_chromium_rel_ng
Change-Id: I6a642374e33876966a5552fb0cdf552dc6d79aaa
Reviewed-on: https://chromium-review.googlesource.com/762345
Commit-Queue: Bill Budge <bbudge@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49305}

Adds block-level coverage tracking for binary && and ||
expressions. Introduces a BinaryOperation source-range
for tracking the operations themselves and an Expression
source-range, used for tracking NaryLogical expressions.

This builds on work by jgruber@chromium.org in
the issue.

TBR=marja@chromium.org
R=jgruber@chromium.org, rmcilroy@chromium.org

Bug: v8:6660
Change-Id: I83a81f13a3514a734c06948b2d3e91138fb00e18
Reviewed-on: https://chromium-review.googlesource.com/754564
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49304}

This reverts commit 22932d6b.

Reason for revert: TSAN https://build.chromium.org/p/client.v8/builders/V8%20Linux64%20TSAN/builds/18232

Original change's description:
> Reland "[runtime] Slightly optimize creation of class literals."
> 
> Bug: v8:5799
> Change-Id: I782ec131c7194aef20942a19750168a974913c3f
> Reviewed-on: https://chromium-review.googlesource.com/757337
> Commit-Queue: Igor Sheludko <ishell@chromium.org>
> Reviewed-by: Toon Verwaest <verwaest@chromium.org>
> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#49291}

TBR=ulan@chromium.org,rmcilroy@chromium.org,jarin@chromium.org,ishell@chromium.org,verwaest@chromium.org

Change-Id: I0742d25b0e2364efc696d19492ba20614a3821fa
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:5799
Reviewed-on: https://chromium-review.googlesource.com/763458Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49303}

We introduce nodes with control output during intrinsic IsInstanceType
lowering, and must carefully connect them to subsequent control inputs.

Bug: v8:7002
Change-Id: I2e3066943b8f7e36652438ae6ca560932188203e
Reviewed-on: https://chromium-review.googlesource.com/763633Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Michael Stanton <mvstanton@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49302}

Bug: chromium:778668
Change-Id: Ie75f2ecb9e6134b6eb57c7d7fb6ea33cbb2fc2bf
Reviewed-on: https://chromium-review.googlesource.com/753324
Commit-Queue: Daniel Clifford <danno@chromium.org>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49301}

This is a reland of ba76ad68
Original change's description:
> [Turbofan] Introduce AllocateRaw node
>
> In order to simplify and verify the TurboFan graph, we
> need to wire allocations into the control chain after
> effect control linearization.
>
> Bug: v8:7002
> Change-Id: I4c5956c8d16773d721482d46a0b407bee01a9597
> Reviewed-on: https://chromium-review.googlesource.com/738139
> Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
> Commit-Queue: Michael Stanton <mvstanton@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#49209}

TBR=jarin@chromium.org

Bug: v8:7002
Change-Id: Iba588c498bb5de113abfba7f9e40cfe4325dea4a
Reviewed-on: https://chromium-review.googlesource.com/758436
Commit-Queue: Michael Stanton <mvstanton@chromium.org>
Reviewed-by: Michael Stanton <mvstanton@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49300}

MIPS team has recently migrated to @mips.com e-mail address.
Dusan Simicic is no longer part of MIPS V8 team, therefore
his name is removed from OWNERS.

TBR=mstarzinger@chromium.org
NOTRY=true

Bug: 
Change-Id: I67fde24a5b9214fa3fca05c0399888b8d18fc699
Reviewed-on: https://chromium-review.googlesource.com/758639
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49299}

R=petermarshall@chromium.org

Change-Id: I6901ddcd1ca1fda474e8d2766fbfc60d2f5a9bec
Reviewed-on: https://chromium-review.googlesource.com/763628Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49298}

We'll use one generic isolate for all number fuzzers. The previous
deopt isolate will be deleted, once the infra hooks have changed.

Bug: v8:6917
Change-Id: I809613548cd935a0208febb002572cc063697324
Reviewed-on: https://chromium-review.googlesource.com/763534Reviewed-by: Sergiy Byelozyorov <sergiyb@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49297}

Temporary implementation of GC fuzzer based on the deopt fuzzer.
It will be merged with the deopt fuzzer to create more general numfuzzer.

Webkit test suite updated to ignore trace_incremental_marking flag output.

Bug: v8:6917
Change-Id: I053ae32f3cd3f74ba8b71fc5bdfc7264f54dca11
Reviewed-on: https://chromium-review.googlesource.com/758437
Commit-Queue: Michał Majewski <majeski@google.com>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49296}

TBR=sergiyb@chromium.org
NOTRY=true
NOTREECHECKS=true

Bug: v8:7012
Change-Id: I5895fcda768696c90f3f766d4beef6f75ec9f79f
Reviewed-on: https://chromium-review.googlesource.com/763530
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Sergiy Byelozyorov <sergiyb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49295}

Speculative revert due to canary crashes. I'll begin relanding these
one-by-one next week.

This bundles two reverts:

Revert "[snapshot] Lazy-deserialize bytecode handlers"
This reverts commit b4587369.

Revert "[interpreter] Remove mechanism for bytecode handler reuse"
This reverts commit 07fc87a2.

TBR: rmcilroy@chromium.org,mlippautz@chromium.org,yangguo@chromium.org
Bug: chromium:783708
Change-Id: I6f8314b9eeafd9412a1c69843bc242e7da240eee
Reviewed-on: https://chromium-review.googlesource.com/763428
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49294}

Keep separate track of isolate cache hits that conflict with
producing/consuming the code cache, so that we can see how many code
cache hits are "stolen" by the isolate cache, and how many isolate cache
entries are "wasted" by recompiling for cache production.

Bug: chromium:769203
Change-Id: I3d8dbfc6a8981b779eb073176454ad43dfbcbaaf
Reviewed-on: https://chromium-review.googlesource.com/763368Reviewed-by: Mythri Alle <mythria@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49293}

This is a reland of 6c613288
Original change's description:
> [Liftoff] Implement parallel register moves
> 
> This was not implemented so far, leading to lots of clusterfuzz issues.
> Testing this feature would require complicating the interface a lot and
> exposing more implementation details in the header file, hence we just
> go with regression tests for now.
> 
> R=ahaas@chromium.org, titzer@chromium.org
> 
> Bug: v8:6600, chromium:782280
> Change-Id: I12863f3eb59a8dffdcc7d3bfb8e1f0ae0eec15ee
> Reviewed-on: https://chromium-review.googlesource.com/758772
> Reviewed-by: Andreas Haas <ahaas@chromium.org>
> Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#49286}

Bug: v8:6600, chromium:782280
Change-Id: I82a75bfeaf83dc63a2917da3ccdc4721c5d689e7
Reviewed-on: https://chromium-review.googlesource.com/763387Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49292}

Bug: v8:5799
Change-Id: I782ec131c7194aef20942a19750168a974913c3f
Reviewed-on: https://chromium-review.googlesource.com/757337
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49291}

This reverts commit 9664d017.

Reason for revert: Planned revert, this is on Canary 3264 and V8
branch 6.4.245.

Original change's description:
> [snapshot] Flip --lazy-handler-deserialization
>
> Flip this for a day or two to gather perf bot results & stability
> issues. Results will be collected in https://crbug.com/782637.
>
> TBR=hablich@chromium.org
>
> Bug: v8:6624, chromium:782637
> Change-Id: I70eb5d6287d4723f935715ef80d9ba129dc282f0
> Reviewed-on: https://chromium-review.googlesource.com/758375
> Reviewed-by: Jakob Gruber <jgruber@chromium.org>
> Commit-Queue: Jakob Gruber <jgruber@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#49222}

TBR=hablich@chromium.org,jgruber@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: v8:6624, chromium:782637
Change-Id: I2a6ee63f7191d186810d7352ee63b6b664e74157
Reviewed-on: https://chromium-review.googlesource.com/763427
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49290}

This reverts commit 6c613288.

Reason for revert: breaks compilation on win64 bot: https://build.chromium.org/p/client.v8/builders/V8%20Win64%20-%20msvc/builds/69

Original change's description:
> [Liftoff] Implement parallel register moves
> 
> This was not implemented so far, leading to lots of clusterfuzz issues.
> Testing this feature would require complicating the interface a lot and
> exposing more implementation details in the header file, hence we just
> go with regression tests for now.
> 
> R=​ahaas@chromium.org, titzer@chromium.org
> 
> Bug: v8:6600, chromium:782280
> Change-Id: I12863f3eb59a8dffdcc7d3bfb8e1f0ae0eec15ee
> Reviewed-on: https://chromium-review.googlesource.com/758772
> Reviewed-by: Andreas Haas <ahaas@chromium.org>
> Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#49286}

TBR=titzer@chromium.org,ahaas@chromium.org,clemensh@chromium.org

Change-Id: I386983da7f9f03d54cef2190b01fd2cc5785966e
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:6600, chromium:782280
Reviewed-on: https://chromium-review.googlesource.com/763367Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49289}

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/1c66ba1..3dd2b5f

TBR=machenbach@chromium.org,hablich@chromium.org,sergiyb@chromium.org

Change-Id: I345def7a1ade64accc9570b8c8af6f0514058da1
Reviewed-on: https://chromium-review.googlesource.com/763130Reviewed-by: v8 autoroll <v8-autoroll@chromium.org>
Commit-Queue: v8 autoroll <v8-autoroll@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49288}

R=hpayer@chromium.org
BUG=v8:6792

Change-Id: Iba360a83c8c1d929c29c0a4e0c5f32cef8755c85
Reviewed-on: https://chromium-review.googlesource.com/758650Reviewed-by: Hannes Payer <hpayer@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49287}

This was not implemented so far, leading to lots of clusterfuzz issues.
Testing this feature would require complicating the interface a lot and
exposing more implementation details in the header file, hence we just
go with regression tests for now.

R=ahaas@chromium.org, titzer@chromium.org

Bug: v8:6600, chromium:782280
Change-Id: I12863f3eb59a8dffdcc7d3bfb8e1f0ae0eec15ee
Reviewed-on: https://chromium-review.googlesource.com/758772Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49286}

- Implement exchangeable timer clock for RuntimeCallStats for testing
- Rewrite RuntimeCAllStatsTest to overwrite the default RCS timer

This gets rid of the previous flakiness for these tests due to using
the real platform timer.

Bug: v8:5677
Change-Id: Iff312c7f79ab97407ba1c0c2c72fb0b35a5efdf1
Reviewed-on: https://chromium-review.googlesource.com/760416Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49285}

The DEPS roll in f3a2e34d updated ICU to a version that includes
a fix for https://ssl.icu-project.org/trac/ticket/13462. As a
result, our Script_Extension data is now correct again.

This patch re-enables the Test262 tests that were failing due to this
ICU data bug.

BUG=v8:4743

Cq-Include-Trybots: master.tryserver.v8:v8_linux_noi18n_rel_ng
Change-Id: If0f08693ed0355c59b9c02aa6d941dab1588431c
Reviewed-on: https://chromium-review.googlesource.com/761616Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Mathias Bynens <mathias@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49284}

There were some places left where that could happen.

Bug: chromium:782754
Change-Id: I1db1f5b361cdf443b730a220c0e569ad48dd298d
Reviewed-on: https://chromium-review.googlesource.com/758841Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49283}

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/1cfb9fe..1c66ba1

Rolling v8/buildtools: https://chromium.googlesource.com/chromium/buildtools/+log/73ddd64..93a751e

TBR=machenbach@chromium.org,hablich@chromium.org,sergiyb@chromium.org

Change-Id: I05cc6e607da1ae1f7afbd147735a5ccb83e9d6e6
Reviewed-on: https://chromium-review.googlesource.com/762988Reviewed-by: v8 autoroll <v8-autoroll@chromium.org>
Commit-Queue: v8 autoroll <v8-autoroll@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49282}

This came up in https://crrev.com/c/758410

R=machenbach@chromium.org

Change-Id: Ia6849a34962628fb17ef61b803f10a1e7c334cd9
Reviewed-on: https://chromium-review.googlesource.com/758852Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Sergiy Byelozyorov <sergiyb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49281}

Fixes .gyp scaffolding for building on Windows.

Patch from Refael Ackermann <refack@gmail.com>.
https://github.com/nodejs/node/pull/16848/commits/5528afd073efe3fe4f5019887f30134d649abc16

Bug=v8:7061

Change-Id: I4faaf3f488b6725942746d74838ef7ce73b1e8d0
Reviewed-on: https://chromium-review.googlesource.com/761477Reviewed-by: Mathias Bynens <mathias@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Mathias Bynens <mathias@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49280}

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/cfed275..1cfb9fe

Rolling v8/third_party/catapult: https://chromium.googlesource.com/catapult/+log/af046c5..f83c79a

Rolling v8/third_party/icu: https://chromium.googlesource.com/chromium/deps/icu/+log/b318966..5ed2698

TBR=machenbach@chromium.org,hablich@chromium.org,sergiyb@chromium.org

Change-Id: I03094c38301d65ce0795f9fbc0d8660ffce47f49
Reviewed-on: https://chromium-review.googlesource.com/761321Reviewed-by: v8 autoroll <v8-autoroll@chromium.org>
Commit-Queue: v8 autoroll <v8-autoroll@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49279}

R=mlippautz@chromium.org
BUG=v8:6792

Change-Id: I4b148b4bcb6e3cb73bc58eaad61d52a14da19a35
Reviewed-on: https://chromium-review.googlesource.com/760739Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49278}

Removes the handling of the flag independent. The flag will be removed in a followup.

The patch changes handling of V8::PersistentBase that are set to Weak:
- The Scavenger ignores the flag independent.
- The Scavenger keeps alive anything that is marked as Active.
- The Scavenger is free to drop weak handles of non-Active object if they 
  are otherwise dead.

Active:
- Any JSObject will always be marked Active.
- Any JSApiObject will be marked Active if it has been modified (=has elements, properties, etc.)

CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_trusty_blink_rel;master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel;master.tryserver.chromium.android:android_optional_gpu_tests_rel

Bug: chromium:780749
Change-Id: If1f547f2419930ad9400bd3b11bdbf609cb57649
Reviewed-on: https://chromium-review.googlesource.com/741801
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Reviewed-by: Hannes Payer <hpayer@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49277}