This adds support to the KeyedLoadIC to ignore out of bounds accesses
for Strings and return undefined instead. We add a dedicated bit to the
Smi handler to encode the OOB state and have TurboFan generate appropriate
code for that case as well. This is mostly useful when programs
accidentially access past the length of a string, which was observed and
fixed for example in Babel recently, see

  https://github.com/babel/babel/pull/6589

for details. The idea is to also extend this mechanism to Arrays and
maybe other receivers, as reading beyond the length is also often used
in jQuery and other popular libraries.

Note that this is considered a mitigation for a performance cliff and
not a general optimization of OOB accesses. These should still be
avoided and handled properly instead.

This seems to further improve the babel test on the web-tooling-benchmark
by around 1%, because the OOB access no longer turns the otherwise
MONOMORPHIC access into MEGAMORPHIC state.

Bug: v8:6936, v8:7014
Change-Id: I9df03304e056d7001a65da8e9621119f8e9bb55b
Reviewed-on: https://chromium-review.googlesource.com/744022
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49049}

This both simplifies the code, and brings it in-line with
what we need for wasm on the native heap.

Bug: v8:6876
Change-Id: Ia48aed86ddcd94e85c0aecc053c327dfacb795d6
Reviewed-on: https://chromium-review.googlesource.com/744593
Commit-Queue: Mircea Trofin <mtrofin@chromium.org>
Commit-Queue: Brad Nelson <bradnelson@chromium.org>
Reviewed-by: Brad Nelson <bradnelson@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49048}

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/c5d82db..7765787

Rolling v8/buildtools: https://chromium.googlesource.com/chromium/buildtools/+log/e043d81..3275a09

Rolling v8/third_party/android_tools: https://chromium.googlesource.com/android_tools/+log/110e5f6..ca0bd08

Rolling v8/third_party/catapult: https://chromium.googlesource.com/catapult/+log/52d748d..6fd9f08

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

Change-Id: Ib82da8ba88f625e1d64070d69df742a3ec0792ef
Reviewed-on: https://chromium-review.googlesource.com/745603Reviewed-by: v8 autoroll <v8-autoroll@chromium.org>
Commit-Queue: v8 autoroll <v8-autoroll@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49047}

This reverts commit 521fa16e.

Reason for revert: fails tests under code-serializer:

https://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20debug/builds/17691

Original change's description:
> [runtime] Slightly optimize creation of class literals.
> 
> TBR=bmeurer@chromium.org
> 
> Bug: v8:5799
> Change-Id: I61de5f8b3333db174dadf76ed983950acb39742b
> Reviewed-on: https://chromium-review.googlesource.com/649509
> Commit-Queue: Igor Sheludko <ishell@chromium.org>
> Reviewed-by: Toon Verwaest <verwaest@chromium.org>
> Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
> Reviewed-by: Yang Guo <yangguo@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#49044}

TBR=rmcilroy@chromium.org,yangguo@chromium.org,mythria@chromium.org,gsathya@chromium.org,ishell@chromium.org,verwaest@chromium.org

Change-Id: I994edb855a8a0aa6e7e7476b0b013a46aac6f2e7
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:5799
Reviewed-on: https://chromium-review.googlesource.com/745581Reviewed-by: Adam Klein <adamk@chromium.org>
Commit-Queue: Adam Klein <adamk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49046}

Bug: v8:5785
Cq-Include-Trybots: master.tryserver.chromium.linux:linux_chromium_rel_ng
Change-Id: Ia386725996beb8f47f97930c9dfc8a9639887fea
Reviewed-on: https://chromium-review.googlesource.com/744739Reviewed-by: Adam Klein <adamk@chromium.org>
Commit-Queue: Sathya Gunasekaran <gsathya@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49045}

TBR=bmeurer@chromium.org

Bug: v8:5799
Change-Id: I61de5f8b3333db174dadf76ed983950acb39742b
Reviewed-on: https://chromium-review.googlesource.com/649509
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49044}

R=joransiu@ca.ibm.com, jbarboza@ca.ibm.com, michael_dawson@ca.ibm.com

Bug: 
Change-Id: I1f25a81637dd50b1d7e9a47154e3df4c61521fad
Reviewed-on: https://chromium-review.googlesource.com/744504Reviewed-by: Joran Siu <joransiu@ca.ibm.com>
Commit-Queue: Junliang Yan <jyan@ca.ibm.com>
Cr-Commit-Position: refs/heads/master@{#49043}

Create new state before parsing FormalParameter because we don't
want to use any of the parameters as an inferred function name.

Previously the stacktrace was:
  test.js:3: Error: boom
      throw new Error('boom');
      ^
  Error: boom
      at param (test.js:3:11)
      at test.js:4:5
      at test.js:6:3

The stacktrace with this patch:
  test.js:3: Error: boom
      throw new Error('boom');
      ^
  Error: boom
      at test.js:3:11
      at test.js:4:5
      at test.js:6:3


Bug: v8:6822, v8:6513
Change-Id: Ifbadc660fc4e85248af405acd67c025f11662bd4
Reviewed-on: https://chromium-review.googlesource.com/742657Reviewed-by: Adam Klein <adamk@chromium.org>
Commit-Queue: Sathya Gunasekaran <gsathya@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49042}

With the existing platform API it is not possible to post foreground
tasks from background tasks. This is, however, required to implement
asynchronous compilation for WebAssembly. With this CL we add the
concept of a TaskRunner to the platform API. The TaskRunner contains
all data needed to post a foreground task and can be used both from a
foreground task and a background task. Eventually the TaskRunner should
replace the existing API.

In addition, this CL contains a default implementation of the
TaskRunner. This implementation has tempory workaround for platforms
which do not provide a TaskRunner implementation yet. This default
implementation should be deleted again when all platforms provide a
TaskRunner implementation.

R=rmcilroy@chromium.org

Cq-Include-Trybots: master.tryserver.chromium.linux:linux_chromium_rel_ng
Change-Id: I6ea4a1c9da1eb9a19e8ce8f2163000dbc2598802
Reviewed-on: https://chromium-review.googlesource.com/741588
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49041}

This CL contains the base implementation for logging function events.
Currently only compiler events are support (compile, compile-lazy...),
future CLs will enable log events for parsing and first-time exeuction
of functions.

Bug: chromium:757467
Change-Id: Ia705979190a3ebc1009989610483a7a141bc504b
Reviewed-on: https://chromium-review.googlesource.com/743921Reviewed-by: Igor Sheludko <ishell@chromium.org>
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49040}

... when storing to proxies.

Bug: chromium:772897
Change-Id: Ia91e69f35dc3b1f67b67038bd8206e508149e9a3
Reviewed-on: https://chromium-review.googlesource.com/744041Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49039}

Port 776d6e9d

R=rossberg@chromium.org, joransiu@ca.ibm.com, michael_dawson@ca.ibm.com, jbarboza@ca.ibm.com
BUG=
LOG=N

Change-Id: I62e59ba70fac2627a5ee00fd3007766c7c570ba3
Reviewed-on: https://chromium-review.googlesource.com/742694Reviewed-by: Ben Titzer <titzer@chromium.org>
Commit-Queue: Junliang Yan <jyan@ca.ibm.com>
Cr-Commit-Position: refs/heads/master@{#49038}

This reverts commit ecd3a2ea.

Reason for revert: Bug 779509, a crash with chrome.

Original change's description:
> [TurboFan] Remove maximum inlining levels check from inlining heuristics
> 
> We have a check on maximum number of levels that can be inlined. This
> in some cases causes performance cliffs, when we cannot inline a small
> function because it has exceeded the number of levels. This cl removes
> that check. The intuition is that, having gone down several levels in
> a particular line stopping inlining that chain and exploring a new
> call site may not be beneficial.
> 
> Bug: v8:6871
> Change-Id: I120056db38e78ce48dff010b6cf994259238582a
> Reviewed-on: https://chromium-review.googlesource.com/741705
> Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
> Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#49009}

TBR=mythria@chromium.org,bmeurer@chromium.org

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

Bug: v8:6871
Change-Id: I4766f911cb326c224af110be5c0dd7a44362a880
Reviewed-on: https://chromium-review.googlesource.com/743785Reviewed-by: Michael Stanton <mvstanton@chromium.org>
Commit-Queue: Michael Stanton <mvstanton@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49037}

- Add WeakMapPrototypeSet and WeakSetPrototypeAdd TFJ builtins
  - Fast paths for...
    1) existing key
    2) new key when ObjectHashTable has a "sufficient capacity"
- Create WeakCollectionsBuiltinsAssembler to consolidate common WeakMap/WeakSet code generation
- Convert existing WeakMapLookupHashIndex to use WeakCollectionsBuiltinsAssembler

Some quick benchmarks shows performance gains of...
- 1.56x - 1.98x for WeakMap constructor
- 1.66x - 2.06x for WeakSet constructor
- 1.50x - 2.11x for WeakMap.p.set
- 1.54x - 2.26x for WeakSet.p.add

https: //github.com/peterwmwong/v8-perf/blob/master/weakcollection-set/README.md
Bug: v8:5049, v8:6604
Change-Id: I3499d46be6b2b3b1d8d46720ebe86cc5142ee542
Reviewed-on: https://chromium-review.googlesource.com/737935
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49036}

Test that console.time/End/Stamp properly show up in the log file.

Change-Id: I99904e20fc98811ed3e3b5e5a9d186b459b8d4be
Reviewed-on: https://chromium-review.googlesource.com/743020
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49035}

This proceeds the experiment using the legacy bots, since luci bots
are blocked on https://crbug.com/776734.

NOTRY=true

Bug: chromium:772816, chromium:776734
Change-Id: I7532e04e98a96d69dbeefcd6edf66fb0cddbe111
Reviewed-on: https://chromium-review.googlesource.com/743365Reviewed-by: Sergiy Byelozyorov <sergiyb@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49034}

This reverts commit f259ec2d.

Reason for revert: Breaks tree

Original change's description:
> [build] Include deopt-fuzzer isolates on fuzzer builders
> 
> TBR=sergiyb@chromium.org
> NOTRY=true
> NOTREECHECKS=true
> 
> Bug: v8:7012
> Change-Id: I1d0b0488cd9b7bf6a30edc0b010f32fb0914ed0b
> Reviewed-on: https://chromium-review.googlesource.com/743783
> Commit-Queue: Michael Achenbach <machenbach@chromium.org>
> Reviewed-by: Michael Achenbach <machenbach@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#49032}

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

Change-Id: If1846d2a711edeb44f031e536f84cc4b71a107e5
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:7012
Reviewed-on: https://chromium-review.googlesource.com/743784Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49033}

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

Bug: v8:7012
Change-Id: I1d0b0488cd9b7bf6a30edc0b010f32fb0914ed0b
Reviewed-on: https://chromium-review.googlesource.com/743783
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49032}

Change-Id: Ib7254e7239169ec7148cdd02208eb363465c5db6
Reviewed-on: https://chromium-review.googlesource.com/743725Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49031}

This prepares for:
https://chromium-review.googlesource.com/c/chromium/tools/build/+/743381

NOTRY=true

Bug: v8:7012
Change-Id: Ic40aa08cbc7b68b2a1b55924536a319f729a557a
Reviewed-on: https://chromium-review.googlesource.com/743363Reviewed-by: Sergiy Byelozyorov <sergiyb@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49030}

Following up on adding n-ary nodes, this extends the parser and
interpreter to support n-ary logical operations.

Bug: v8:6964
Bug: chromium:731861
Change-Id: Ife2141c389b9abccd917ab2aaddf399c436ef777
Reviewed-on: https://chromium-review.googlesource.com/735497Reviewed-by: Adam Klein <adamk@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49029}

Change-Id: Ic3e6db16678f513d8bb8eaea2695ae78e383b448
Reviewed-on: https://chromium-review.googlesource.com/736034
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49028}

The bytecode interpreter nor TF rely on the explicit return value of store ICs anymore, so we can just return whatever is in the result slot. It won't be visible to JS anyway.

Bug: 
Change-Id: I389615d1d77c5b050832f23a08e3d3bc07d9cbc6
Reviewed-on: https://chromium-review.googlesource.com/743366Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49027}

This is preparation for supporting OOB loads from strings, which
requires the KeyedLoadIC to track this information.

Bug: v8:6936, v8:7014
Change-Id: Ide132244ee523397dd418d21fe3377976f6633fd
Reviewed-on: https://chromium-review.googlesource.com/743481Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49026}

This reverts commit 32141e93.

Reason for revert: Got merged to stable end of last week.

Original change's description:
> Disable --turbo-inline-array-builtins by default.
> 
> Current chrome stable has a high number of crashes due to bugs in
> this feature. These bugs are already fixed but the fixes are hard
> to merge back. Therefore we decided to disable the feature in stable.
> This CL is intended to be merged to stable and then reverted in tot.
> 
> Bug: chromium:762020
> Change-Id: Ibd5a08e3b303a204fb84a408271a1c0f97cc5b7b
> Reviewed-on: https://chromium-review.googlesource.com/738176
> Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
> Commit-Queue: Georg Neis <neis@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#48931}

TBR=jarin@chromium.org,neis@chromium.org

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

Bug: chromium:762020
Change-Id: Id1fe2f417e09a7b451484fc16710b09469cdb74d
Reviewed-on: https://chromium-review.googlesource.com/743321Reviewed-by: Georg Neis <neis@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49025}

Remove distinction between lazy and non-lazy CallApiCallback, always explicitly set up target context

Bug: 
Change-Id: I0cb751a0415433fdfec21451e2fac3e0726bf26e
Reviewed-on: https://chromium-review.googlesource.com/743019
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49024}

The CheckSeqString operator unnecessarily materialized two bits for the
separate conditions, but we can actually check for SeqString with just a
single mask instead, which saves the intermediate computations and two
registers.

Bug: v8:5267
Change-Id: Ib937a5a4eebdc271a2bbbc6f074f5992e06b2fa9
Reviewed-on: https://chromium-review.googlesource.com/741702Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49023}

Change-Id: I721a014262641ccc2b7dde97eaf0cadbb8d0b649
Reviewed-on: https://chromium-review.googlesource.com/743016Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49022}

This was discovered on the babel test of the web-tooling-benchmark,
which suffers from a high %KeyedGetProperty overhead, and most of
these calls come from the fact that the KeyedLoadIC_Megamorphic bails
out to the runtime call for all String instance types. Just handling
in-bound accesses to characters reduces the overhead incurred by
%KeyedGetProperty from roughly 9% to roughly 2% only.

This reduces the number of runs per second on the babel test by around
7-8% on average.

Bug: v8:6936, v8:7014
Change-Id: I0dc247d7d6457c7032636d2852cb54cef1b24979
Reviewed-on: https://chromium-review.googlesource.com/743012Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49021}

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/824d0c1..c5d82db

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

Change-Id: I7c4bbc126a7d3322a836562684e466bf2a667747
Reviewed-on: https://chromium-review.googlesource.com/742805Reviewed-by: v8 autoroll <v8-autoroll@chromium.org>
Commit-Queue: v8 autoroll <v8-autoroll@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49020}

Interpreter entries may be called from wasm functions, when debugging.
That means that, when moving on the native heap, interpreter entries
need to be native, too. That means they cannot reference movable GC
objects.

The only such reference was to the instance object, which is needed
in the WasmRunInterpreter runtime function. We can fetch the instance
using GetWasmInstanceOnTop() instead.

Bug: v8:6876
Change-Id: I7198a849cc0e441b057537a570a3dfa6f3197149
Reviewed-on: https://chromium-review.googlesource.com/742391
Commit-Queue: Mircea Trofin <mtrofin@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49019}

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/626232b..824d0c1

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

Change-Id: I87554731f13dc5bf1137816c4a6b4cb43d27bf8f
Reviewed-on: https://chromium-review.googlesource.com/742803Reviewed-by: v8 autoroll <v8-autoroll@chromium.org>
Commit-Queue: v8 autoroll <v8-autoroll@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49018}

Change-Id: I3262744d08629d23e792e2c247fffb48cdd42876
Reviewed-on: https://chromium-review.googlesource.com/742921Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49017}

Change-Id: Ie62dbd8f7759f66d4b6361fbe3e5bdbad705bb82
Reviewed-on: https://chromium-review.googlesource.com/742881Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49016}

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/e1ba03b..626232b

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

Change-Id: Ic327a6f9d8198eb7754065919c54e4c5bf6d75d3
Reviewed-on: https://chromium-review.googlesource.com/742782Reviewed-by: v8 autoroll <v8-autoroll@chromium.org>
Commit-Queue: v8 autoroll <v8-autoroll@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49015}

Bug: v8:6791
Change-Id: Id85bd701eaa574eea1335cdc916323810616cef9
Reviewed-on: https://chromium-review.googlesource.com/738936
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49014}

This eliminates the AstValue class, effectively moving its
implementation into the Literal AstNode. This should cause
no difference in behavior, but it does signal some shifts
in the underlying system. Biggest changes include:

  - Reduction in AST memory usage
  - No duplicate HeapNumbers in Ignition constant pools
  - Non-String values are allocated either at constant pool
    creation time (or at boilerplate creation time for literals),
    rather than at AstValueFactory::Internalize() time.

There are a variety of test-only/debug-only changes due to these
switches as well.

Bug: v8:6984
Change-Id: I5f178040ce2796d4e7370c24d1063419e1c843a1
Reviewed-on: https://chromium-review.googlesource.com/731111
Commit-Queue: Adam Klein <adamk@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49013}

- Moves platform-specific platform tests to test-platform.cc.
- Moves all tests into v8::internal namespace.

Bug: chromium:756050
Change-Id: Ic67d6b84dda07a9d5f6a0cc6489bfae90c52c0f2
Reviewed-on: https://chromium-review.googlesource.com/739983
Commit-Queue: Bill Budge <bbudge@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49012}

This is a reland of 0b0bfc4b
Original change's description:
> [Memory] Unify POSIX memory management calls.
> 
> - Moves base::OS memory management calls into platform-posix.cc,
>   using preprocessor to adjust for each platform.
> 
> Bug: chromium:756050
> Change-Id: I2af4dce4379ad1fe9e22e5ab5c6d6a7faa3655b3
> Reviewed-on: https://chromium-review.googlesource.com/738890
> Commit-Queue: Bill Budge <bbudge@chromium.org>
> Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
> Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
> Reviewed-by: Hannes Payer <hpayer@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#48981}

Bug: chromium:756050
Change-Id: Id644d12ee117cdb2eb9d4bf0b4a2c8e3c43ae7be
Reviewed-on: https://chromium-review.googlesource.com/741485Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Bill Budge <bbudge@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49011}

This happens when RCS are enabled dynamically and the callsite is inside
the background parser.

BUG=chromium:760649

Change-Id: I216b955ed91d9c663ce3027aaa8ffb515bfe13ab
Reviewed-on: https://chromium-review.googlesource.com/740911Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Commit-Queue: Alexei Filippov <alph@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49010}