The protector is useful for follow-up optimizations on string iterator.
Tests are also added.

Change-Id: I416037c742628c4d4d3b878d0df727a9ae7162f7
Reviewed-on: https://chromium-review.googlesource.com/1251122Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Sigurd Schneider <sigurds@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Commit-Queue: Hai Dang <dhai@google.com>
Cr-Commit-Position: refs/heads/master@{#56315}

Delay the creation of FunctionNameVariables until we validated the
FormalParameters. This is needed so we don't declare them in cases where
we later get an error, have to reset, and reparse.

Bug: chromium:890553, v8:7926
Change-Id: I742e6f7f71158e3903843bd583dc7943468c18f6
Reviewed-on: https://chromium-review.googlesource.com/1254061Reviewed-by: Marja Hölttä <marja@chromium.org>
Commit-Queue: Florian Sattler <sattlerf@google.com>
Cr-Commit-Position: refs/heads/master@{#56314}

R=titzer@chromium.org

Change-Id: I543f7d65d04b54951be126ca1e30bb7e81f026a8
Reviewed-on: https://chromium-review.googlesource.com/1253606Reviewed-by: Ben Titzer <titzer@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56313}

This removes the burden from Torque not to emit unnecessary phis.
This is factored out from the Torque IR CL (https://crrev.com/c/1245766).

Change-Id: I302714250e9ea6367f37613c09caa522d56c151c
Reviewed-on: https://chromium-review.googlesource.com/1254121Reviewed-by: Daniel Clifford <danno@chromium.org>
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56312}

Instead of writing the forwarding pointer of this object and treating it like
an object that would survive on scavenge just write the actual string pointer
to the outer slot. As a consequence, the ThingString will not look like a live
object and is handled properly when pruning the external string table.

Bug: v8:8249
Test: test/cctest/heap/test-external-string-tracker.cc
Change-Id: I975900213e2e4b598f298c8f78b6c6047c9e6da4
Reviewed-on: https://chromium-review.googlesource.com/1252885Reviewed-by: Hannes Payer <hpayer@chromium.org>
Commit-Queue: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56311}

It was shipped in Chrome 67.

Bug: v8:6791, v8:8238
Cq-Include-Trybots: luci.chromium.try:linux_chromium_headless_rel;luci.chromium.try:linux_chromium_rel_ng;luci.v8.try:v8_linux_noi18n_rel_ng;master.tryserver.blink:linux_trusty_blink_rel
Change-Id: I94d8f0aa18570452403a35dea270b18f155c970a
Reviewed-on: https://chromium-review.googlesource.com/1253604Reviewed-by: Georg Neis <neis@chromium.org>
Commit-Queue: Mathias Bynens <mathias@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56310}

This change adds an infrastructure to "snapshot" data that is being
serialized only once. This data lives in its own per-isolate zone, wrapped
in a new CompilerData class.

This change reduces the "serialize standard objects" on TypeScript
benchmark from ~69ms to ~30ms (more than 50% improvement).

Bug: v8:7790
Change-Id: I6ce4f6fb993334969662fdd993d681945a9f3727
Reviewed-on: https://chromium-review.googlesource.com/1238920
Commit-Queue: Maya Lekova <mslekova@chromium.org>
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56309}

Once the broker retired, only allow retrieval of a reference's
handle. That's all we need for now.

Bug: v8:7790
Change-Id: Ib75887ed4a68e19ad7fad4c6046e340502542850
Reviewed-on: https://chromium-review.googlesource.com/1251086Reviewed-by: Maya Lekova <mslekova@chromium.org>
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56308}

Currently, we call the MapRef::AsElementsKind method on an initial
map multiple times (from JSCreateLowering::ReduceJSCreateArray).
However, this does not does not play well with the heap copier/broker,
which only expectes AsElementsKind to be called on initial maps.

This CL makes sure we only call AsElementsKind once (on the initial map).

Bug: chromium:890620
Change-Id: If44421d3900abb7629ea8f789a005b8d8ebaf881
Reviewed-on: https://chromium-review.googlesource.com/1253105Reviewed-by: Georg Neis <neis@chromium.org>
Commit-Queue: Jaroslav Sevcik <jarin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56307}

Shortcuts allow identifiable primary expressions to bypass all productions
starting from assignment expression. We can identify them by looking at the
token after the single token of which the primary expression consists. This CL
adds support for 'identifier' followed by '=' as a primary LHS.

Change-Id: I2f1939a39e03384598359a3a39e1d6cef9967e21
Reviewed-on: https://chromium-review.googlesource.com/1252805Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56306}

This reverts commit c285380c.

Reason for revert: Lots of dcheck failures on GPU bots, e.g.:
https://ci.chromium.org/p/v8/builders/luci.v8.ci/Win%20V8%20FYI%20Release%20(NVIDIA)/1997
https://ci.chromium.org/p/v8/builders/luci.v8.ci/Linux%20V8%20FYI%20Release%20(NVIDIA)/2770

Original change's description:
> Create a fast path to get migration target when updating map
> 
> During map updating, store the pointer to new map in the
> raw_transitions slot of the old map that is deprecated from map
> transition tree. Thus, we can get the migration target directly
> instead of TryReplayPropertyTransitions when updating map.
> 
> This can improve Speedometer2.0 Elm-TodoMVC case by ~5% on ATOM
> Chromebook and ~9% on big-core Ubuntu.
> 
> Change-Id: I56f9ce5183bbdd567b964890f623ef0ceed9b7db
> Reviewed-on: https://chromium-review.googlesource.com/1233433
> Commit-Queue: Shiyu Zhang <shiyu.zhang@intel.com>
> Reviewed-by: Igor Sheludko <ishell@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#56303}

TBR=ishell@chromium.org,shiyu.zhang@intel.com

Change-Id: I9b268d662cfa3a7fec577468eafe6570389252bc
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/1253104Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56305}

The representation changer was lacking support for directly converting
Word64 values to Bit representation.

Bug: chromium:890243, v8:4153, v8:7881, v8:8171, v8:8178
Change-Id: I5fa31716c7b2b10ad00dc31d5035a1ada152661c
Reviewed-on: https://chromium-review.googlesource.com/1251551Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56304}

During map updating, store the pointer to new map in the
raw_transitions slot of the old map that is deprecated from map
transition tree. Thus, we can get the migration target directly
instead of TryReplayPropertyTransitions when updating map.

This can improve Speedometer2.0 Elm-TodoMVC case by ~5% on ATOM
Chromebook and ~9% on big-core Ubuntu.

Change-Id: I56f9ce5183bbdd567b964890f623ef0ceed9b7db
Reviewed-on: https://chromium-review.googlesource.com/1233433
Commit-Queue: Shiyu Zhang <shiyu.zhang@intel.com>
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56303}

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/e76ff65..79a709e

Rolling v8/third_party/catapult: https://chromium.googlesource.com/catapult/+log/d525ef3..98289bc

Rolling v8/tools/clang: https://chromium.googlesource.com/chromium/src/tools/clang/+log/003e878..7792d28

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

Change-Id: I831486cac2077b74f5a4cd89243908dce2cceee4
Reviewed-on: https://chromium-review.googlesource.com/1253186Reviewed-by: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Commit-Queue: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#56302}

Change the way that the (internal) await closures store the link to the
generator object by introducing a dedicated AwaitContext, which stores
the generator object into the extension slot (instead of misusing a
regular FunctionContext here). Also unify the allocation+initialization
of these contexts in the await-related builtins (both for async functions
and generators).

The rationale behind this is that for (zero-cost) async stack traces, we
will need to dig into these contexts and we can do better checking with
a dedicated instance type there. As an additional benefit, we save one
word per await context, since we just use (the otherwise unused) extension
slot to remember the generator object. As yet another benefit we will
never accidentally use any of these contexts in the regular scope chain
lookups, meaning we can also catch bugs there. And last but not least
the objects printing machinery understands these contexts now and can
even print the generator object for AwaitContexts for short printing,
which is really valuable for debugging.

Tbr: ulan@chromium.org
Bug: v8:7253, v8:7522, v8:8015
Change-Id: I86955f5701e694e8a10b91ebe5f52705aa90968d
Reviewed-on: https://chromium-review.googlesource.com/1249491Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56301}

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/eb7ca76..e76ff65

Rolling v8/third_party/catapult: https://chromium.googlesource.com/catapult/+log/7453eba..d525ef3

Rolling v8/tools/clang: https://chromium.googlesource.com/chromium/src/tools/clang/+log/c5434e9..003e878

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

Change-Id: Ic48e0bc7b178093fe7a029f466aebd4a9eea9b40
Reviewed-on: https://chromium-review.googlesource.com/1253183
Commit-Queue: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Reviewed-by: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#56300}

Remove Unpack* methods from all Intl objects
Make the icu data in Intl objects more consistent in naming

Bug: v8:8248
Cq-Include-Trybots: luci.v8.try:v8_linux_noi18n_rel_ng
Change-Id: If81a3010265e91919b548dad2dbd11c5ae8e4abd
Reviewed-on: https://chromium-review.googlesource.com/1252883Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
Commit-Queue: Frank Tang <ftang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56299}

Bug: v8:7684
Cq-Include-Trybots: luci.v8.try:v8_linux_noi18n_rel_ng
Change-Id: Ifbdce635d190bd379414d3410aed1208412a9530
Reviewed-on: https://chromium-review.googlesource.com/1251587Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
Commit-Queue: Frank Tang <ftang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56298}

This CL mirrors the ia32 SIMD conversion, Alltrue/AnyTrue operations
with minor cleanliness changes to use TempRegisters instead of
ScratchRegisters

Change-Id: I84d3e148200dd611a72380b24404b75c73c5352d
Reviewed-on: https://chromium-review.googlesource.com/1174096
Commit-Queue: Deepti Gandluri <gdeepti@chromium.org>
Reviewed-by: Bill Budge <bbudge@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56297}

Remove numbering_system and change the type of locale
to reduce memory usage of JSDateTimeFormat

Bug: v8:8066
Change-Id: I8a319e05312ffa62f22a382bf150bbe9b48f5f54
Reviewed-on: https://chromium-review.googlesource.com/1242093
Commit-Queue: Frank Tang <ftang@chromium.org>
Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56296}

- we can avoid using regexps,
- this CL also fixed a bug.

R=alph@chromium.org

Bug: chromium:870957
Cq-Include-Trybots: luci.chromium.try:linux_chromium_headless_rel;master.tryserver.blink:linux_trusty_blink_rel
Change-Id: I9799507b85942be454a7c20d2768fe7442fc965e
Reviewed-on: https://chromium-review.googlesource.com/1250403
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Reviewed-by: Alexei Filippov <alph@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56295}

New method was added to console spec [1].
This CL implements it.

[1] https://console.spec.whatwg.org/#timelog

R=dgozman@chromium.org,yangguo@chromium.org

Bug: chromium:854474
Cq-Include-Trybots: luci.chromium.try:linux_chromium_headless_rel;master.tryserver.blink:linux_trusty_blink_rel
Change-Id: Ie5f249795979bb886cf824ae9f950c5ef78ce04d
Reviewed-on: https://chromium-review.googlesource.com/1247641
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56294}

Sometimes we do not have promise on stack, e.g. Promise.reject call,
but we need to attribute this pause with promise rejection.

TBR=yangguo@chromium.org

Bug: chromium:755728
Cq-Include-Trybots: luci.chromium.try:linux_chromium_headless_rel;master.tryserver.blink:linux_trusty_blink_rel
Change-Id: I03ca1e1cd6c21677f0a12ece626e2c8a1938437b
Reviewed-on: https://chromium-review.googlesource.com/1249942Reviewed-by: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56293}

This is necessary to be able to share the data for read-only
objects amongst multiple broker instances.

Bug: v8:7790
Change-Id: I0da58f8a9eded06ac6e994bc540a3a1bc481d6a7
Reviewed-on: https://chromium-review.googlesource.com/1251308Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Reviewed-by: Maya Lekova <mslekova@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56292}

Bug: v8:8015, v8:7467
Change-Id: I0a25fdd7631447235839680c993505179a1cd793
Reviewed-on: https://chromium-review.googlesource.com/1238656Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Mathias Bynens <mathias@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56291}

TBR=sergiyb@chromium.org
NOTRY=true

Bug: chromium:890222
Change-Id: I3c3f8902cc0775edfcdcc85bb0cbc3320bf6c1ef
Reviewed-on: https://chromium-review.googlesource.com/1251523
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56290}

This CL adds a bit more rigor to the handling of length properties
in JSObject-derived classes that explicitly contain that property
inline.

This involves:
- Introducing a new superclass of JSArgumentsObject called
  JSArgumentsObjectWithLength that is shared with other object
  instances that also have a fixed length property.
- Adding JSArgumentsObjectWithLength to the type hierarchy in Torque,
  including adding fast-cases for leading the length property for all
  classes deriving from JSObjectWithLength.
- Adding more rigor to Context and NativeContext handling in base.tq.
  This is useful for the map checks required to verify objects are
  argument object types derived from JSArgumentsObjectWithLength.

Change-Id: I2f0a20601ffcb90b3767cbaeb766e9998d3462ec
Reviewed-on: https://chromium-review.googlesource.com/1248661
Commit-Queue: Daniel Clifford <danno@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56289}

We have the generic {no_reg} and {no_dreg}, other definitions are dead.
Currently even {no_dreg} is dead, but I am keeping this because I can
see future need for that.

R=mstarzinger@chromium.org

Bug: v8:8238
Change-Id: I0de597fead6b3def18fd5c530419d3c149f235a8
Reviewed-on: https://chromium-review.googlesource.com/1251123Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56288}

It was accidentally removed in CL that introduced BoundedPageAllocator.

This CL also cleans up the CodeRangeAddressHint a bit.

Bug: v8:8096, chromium:887252
Change-Id: Idc84796dd1ff1b440cbe3515732984264defcf2d
Reviewed-on: https://chromium-review.googlesource.com/1249125
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56287}

Pending phantom handle callbacks are not reliably executed if the heap
shuts down. This can cause to memory leaks or other unwanted behaviour,
like in wasm where the NativeModules (held in Managed objects
implemented via phantom handles) unregister from the WasmEngine in the
second-pass callback. This must be executed before tearing down the
WasmEngine.

This CL fixes this by running pending callback synchronously on heap
tear down.

R=ulan@chromium.org, mlippautz@chromium.org

Bug: v8:8208
Change-Id: I27b630c4d8f1fb12309040ea2179b64eed38710a
Reviewed-on: https://chromium-review.googlesource.com/1249101
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56286}

Minor refactoring, for readability and performance.

R=ahaas@chromium.org

Bug: v8:8015
Change-Id: I30c4a76998c8867aea0e08fd982b4425d4ae8fef
Reviewed-on: https://chromium-review.googlesource.com/1251163Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56285}

Trimming may free up some allocatable pages that can be reused by subsequent
allocations.

This CL also fixes base::AddressRegion::contains(Address, size_t).

Bug: v8:8096
Change-Id: I3b7381fd32f7dbf186dffc1a26d5a88cd8a30d2f
Reviewed-on: https://chromium-review.googlesource.com/1249127Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56284}

|this| cannot be an ambiguous declaration. Actual declarations are inserted
upon function scope creation, so we can simply parse as reference and it will
resolve correctly.

Change-Id: I3aaa1a2666b4caffbf8524caec7068125e10240b
Reviewed-on: https://chromium-review.googlesource.com/1251162Reviewed-by: Marja Hölttä <marja@chromium.org>
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56283}

This reverts commit e4c650ad.

Reason for revert: Break Linux nosnap: https://ci.chromium.org/p/v8/builders/luci.v8.ci/V8%20Linux%20-%20nosnap%20-%20debug/20786

Original change's description:
> [heap] Free dead young generation large objects.
> 
> Bug: chromium:852420
> Change-Id: I77479c3a96bcae6041ddce316c5062f129447edd
> Reviewed-on: https://chromium-review.googlesource.com/1249124
> Commit-Queue: Hannes Payer <hpayer@chromium.org>
> Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#56280}

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

Change-Id: If35a09497e09f5cc7ceef8ec33a7c86761f2a336
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: chromium:852420
Reviewed-on: https://chromium-review.googlesource.com/1251124Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56282}

PreParser now does not longer track which kind of error occurred.
If we see an error we reparse with the parser and report the error.
Furthermore, this fixes tests in test-parsing.

Change-Id: I1860949fab4d65ff4a5a1b63796c7574494f9d50
Reviewed-on: https://chromium-review.googlesource.com/1231173
Commit-Queue: Florian Sattler <sattlerf@google.com>
Reviewed-by: Adam Klein <adamk@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56281}

Bug: chromium:852420
Change-Id: I77479c3a96bcae6041ddce316c5062f129447edd
Reviewed-on: https://chromium-review.googlesource.com/1249124
Commit-Queue: Hannes Payer <hpayer@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56280}

Bug: chromium:890057
Change-Id: I98bc278ebc202c3d8f6417367bd1c592e4824011
Reviewed-on: https://chromium-review.googlesource.com/1250481
Commit-Queue: Georg Neis <neis@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56279}

We might have empty frame_inspector_ here, let's fast return in this
case.

R=yangguo@chromium.org

Bug: chromium:864920
Change-Id: Ia8012251877bb4e04b7f756db72a3039bca6fa9c
Reviewed-on: https://chromium-review.googlesource.com/1250408Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56278}

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/343caac..eb7ca76

Rolling v8/third_party/catapult: https://chromium.googlesource.com/catapult/+log/3cf15a9..7453eba

Rolling v8/third_party/depot_tools: https://chromium.googlesource.com/chromium/tools/depot_tools/+log/f221bac..95d4c85

Rolling v8/third_party/fuchsia-sdk: https://chromium.googlesource.com/chromium/src/third_party/fuchsia-sdk/+log/ce131de..ff74025

Rolling v8/tools/clang: https://chromium.googlesource.com/chromium/src/tools/clang/+log/86c7e6d..c5434e9

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

Change-Id: I7aa1be4f55e02ae0c4df27ccabb77940fbf8f4d3
Reviewed-on: https://chromium-review.googlesource.com/1249960Reviewed-by: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Commit-Queue: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#56277}

The Parser inserts a temporary .promise variable to hold the outer
promise for async functions, but doesn't assign an actually visible
name to it. This change puts the name ".promise" on it (similar to
what we do for other special variables like .result), which makes it
easier to debug this (for V8 developers). It's not observable to
regular developers.

Bug: v8:7522, v8:8015
Change-Id: I388352ad931a49102cb5afe350314337a505a150
Reviewed-on: https://chromium-review.googlesource.com/1249106Reviewed-by: Adam Klein <adamk@chromium.org>
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56276}