TBR=machenbach@chromium.org

No-Try: true
Bug: chromium:616879
Change-Id: Icdd2489b64a4b29beb6d561eee8cb2f9c22a96ba
Reviewed-on: https://chromium-review.googlesource.com/1180201
Commit-Queue: Sergiy Byelozyorov <sergiyb@chromium.org>
Reviewed-by: Sergiy Byelozyorov <sergiyb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55197}

This is a cleanup CL that is preparation for making the byte length
and offsets of typed arrays into unboxed size_t fields.

R=mstarzinger@chromium.org
BUG=v8:7881

Change-Id: Iee8bb2142124c88c71cec7343149ae3f08b40c6c
Reviewed-on: https://chromium-review.googlesource.com/1179829Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Commit-Queue: Ben Titzer <titzer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55196}

This makes sure that a tier-up from Ignition to TurboFan (or any other
code publishing) preserves redirections to the Interpreter. Currently an
interpreted function never switches back to compiled.

R=titzer@chromium.org
TEST=mjsunit/wasm/interpreter-mixed
BUG=v8:7921,v8:8018

Change-Id: Ifca479953509708c998c11cc00b481c232678e00
Reviewed-on: https://chromium-review.googlesource.com/1179661
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Ben Titzer <titzer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55195}

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/7679962..78faf69

Rolling v8/third_party/android_ndk: https://chromium.googlesource.com/android_ndk/+log/5cd8631..4e2cea4

Rolling v8/third_party/catapult: https://chromium.googlesource.com/catapult/+log/f5981fb..3d85a23

Rolling v8/third_party/depot_tools: https://chromium.googlesource.com/chromium/tools/depot_tools/+log/421bc3f..ed0d273

Rolling v8/third_party/fuchsia-sdk: https://chromium.googlesource.com/chromium/src/third_party/fuchsia-sdk/+log/74c827a..454f3b2

Rolling v8/third_party/proguard: https://chromium.googlesource.com/chromium/src/third_party/proguard/+log/d901b76..67ad7bd

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

Change-Id: Ifa11c8924c7571c141ec265d8ca1b8c017c59c8c
Reviewed-on: https://chromium-review.googlesource.com/1179374Reviewed-by: V8 Autoroller <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Commit-Queue: Sergiy Byelozyorov <sergiyb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55194}

This is a reland of 5d69010e

Original change's description:
> [asmjs] Properly validate asm.js heap sizes
> 
> Enforce both engine limitations and spec (http://asmjs.org/spec/latest/)
> limitations on the size of asm.js heaps.
> 
> R=clemensh@chromium.org
> CC=​mstarzinger@chromium.org
> 
> Bug: chromium:873600
> Change-Id: I104c23bbd0a9a7c494f97f8f9e83ac5a37496dfd
> Reviewed-on: https://chromium-review.googlesource.com/1174411
> Commit-Queue: Ben Titzer <titzer@chromium.org>
> Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#55163}

Bug: chromium:873600
Change-Id: Id24070bda3aafb9e1a32af0732a1b18f633ef932
Reviewed-on: https://chromium-review.googlesource.com/1179681
Commit-Queue: Ben Titzer <titzer@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55193}

R=jarin@chromium.org

Bug: v8:7790
Change-Id: I69dd63e0f2e42591c53fa49899bd44d05b03b852
Reviewed-on: https://chromium-review.googlesource.com/1179154
Commit-Queue: Georg Neis <neis@chromium.org>
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55192}

Change-Id: I31cf082abae120dc4f5aa7eadce6513e933d942b
Reviewed-on: https://chromium-review.googlesource.com/1178042
Commit-Queue: Jaroslav Sevcik <jarin@chromium.org>
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Reviewed-by: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55191}

Use CheckBounds and reduce the number of checks required to sanitize the
indices for DataView accesses in optimized code. Also constant-fold the
[[ByteLength]] if the DataView is a known compile-time constant (similar
to what we do for TypedArrays already). This further improves performance
of DataViews by 2-7% depending on the exact test case.

With this change DataView and TypedArray accesses themselves are mostly
on par performance wise.

Bug: chromium:225811
Change-Id: I6838339108b8a4dcf9b13ddecab40f1c3632967c
Reviewed-on: https://chromium-review.googlesource.com/1179741
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
Reviewed-by: Sigurd Schneider <sigurds@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55190}

Bug: v8:6666
Change-Id: I9a9c6779138f7ee601a5061401ef0c777ba2b7ca
Reviewed-on: https://chromium-review.googlesource.com/1179678
Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
Reviewed-by: Sigurd Schneider <sigurds@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55189}

This reduced the number of targets depending on assembler.h
from ~900 to ~350.

Bug: v8:8054
Change-Id: I74ae2ce7a4b27791d0ee25542ee0b2175bedf5f7
Reviewed-on: https://chromium-review.googlesource.com/1174534
Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55188}

Now that we pass in assembler options during builtin setup, we can be
more precise in assembler configuration.

Isolate-independent generation is only requested for isolate-independent
builtins. And pc-relative jumps additionally need a valid code range.

Bug: v8:6666
Change-Id: I64dfb414549a2f1e87610244c48d9405e63a1b12
Reviewed-on: https://chromium-review.googlesource.com/1177707Reviewed-by: Sigurd Schneider <sigurds@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55187}

This way the snapshot will contain only old space objects.

BUG=v8:7308

Cq-Include-Trybots: luci.chromium.try:linux_chromium_rel_ng
Change-Id: Ib19642795b1e8c7cbeda5162be86909c1a777767
Reviewed-on: https://chromium-review.googlesource.com/1177384Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Dan Elphick <delphick@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55186}

This moves write-barrier for writes into code to heap-write-barrier.h
and adds four new functions:
- WriteBarrierForCode(host, rinfo, object) - combined generational
  and marking write barrier.
- WriteBarrierForCode(host) - combined write barrier that rescans
  all pointers in the host (former RecordWritesIntoCode).
- GenerationalWriteBarrierForCode.
- MarkingWriteBarrierForCode.

Bug: v8:8054,v8:7490
Change-Id: Ib1e07cfa1d5998fca2fa44e2ad08c52305f1373f
Reviewed-on: https://chromium-review.googlesource.com/1174436Reviewed-by: Yang Guo <yangguo@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Reviewed-by: Sigurd Schneider <sigurds@chromium.org>
Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55185}

When printing the number and size of the instance types in each
snapshot, break out each line into the number for each AllocationSpace.

(This removes the specific RO_SPACE path that just broke out its stats).

Change-Id: I9d5bcecc4f0e8e1ec5c83409f54164f9bf83c5be
Reviewed-on: https://chromium-review.googlesource.com/1175826Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Dan Elphick <delphick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55184}

JSArrays and JSArrayBuffers are very different animals. As such,
split the js-array.h header into two parts.

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

Bug: v8:5402
Cq-Include-Trybots: luci.chromium.try:linux_chromium_rel_ng
Change-Id: I82f987ecea3e2e1ceaf8f8962a2b88165558c57e
Reviewed-on: https://chromium-review.googlesource.com/1177760Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Commit-Queue: Ben Titzer <titzer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55183}

Change-Id: Ib53ebb8372bd952f038edc06166e7d1c8b05abc2
Reviewed-on: https://chromium-review.googlesource.com/1174549
Commit-Queue: Georg Neis <neis@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55182}

Bug: v8:7790
Change-Id: I268e8673ca5c8f6737cae8190d78caf325e864bd
Reviewed-on: https://chromium-review.googlesource.com/1177604Reviewed-by: Georg Neis <neis@chromium.org>
Commit-Queue: Jaroslav Sevcik <jarin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55181}

R=dgozman

Cq-Include-Trybots: luci.chromium.try:linux_chromium_headless_rel;master.tryserver.blink:linux_trusty_blink_rel
Change-Id: I5fd64b95772ed061c0a432431a6e5273e5d44790
Reviewed-on: https://chromium-review.googlesource.com/1149321
Commit-Queue: Andrey Lushnikov <lushnikov@chromium.org>
Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55180}

This CL refactors the CodeAssembler::Branch(condition, true_body, false_body)
which was introduced by https://crrev.com/c/1175488, and this reduces snapshot by 864 bytes.

Change-Id: Ifde7d6f39bd7f265e71fef5bdcc6e69d8ab5be85
Reviewed-on: https://chromium-review.googlesource.com/1175488Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Commit-Queue: Kanghua Yu <kanghua.yu@intel.com>
Cr-Commit-Position: refs/heads/master@{#55179}

Bug: v8:7955, v8:5751
Cq-Include-Trybots: luci.v8.try:v8_linux_noi18n_rel_ng
Change-Id: I2dbba859472059e684ec2c631b7e96d1289f39f0
Reviewed-on: https://chromium-review.googlesource.com/1173165Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
Commit-Queue: Brian Stell <bstell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55178}

Previously, FormatDate implemented two functions:
(a) "DateTime Format Functions" as in ecma402/#sec-datetime-format-functions
(b) "FormatDateTime( dateTimeFormat, x )" as in ecma402/#sec-formatdatetime

This patch split FormatDate into two separate functions exactly as they are specified.

Cq-Include-Trybots: luci.v8.try:v8_linux_noi18n_rel_ng
Change-Id: Iae47f4d992f1767968e5a6df7d1a45a95bc33192
Reviewed-on: https://chromium-review.googlesource.com/1178886
Commit-Queue: Frank Tang <ftang@chromium.org>
Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55177}

Bug: v8:7790
Change-Id: I1834893f05229834289bc368b00dc314e7de1b65
Reviewed-on: https://chromium-review.googlesource.com/1177746Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55176}

Change-Id: I24893d2db441282df8ac3267b0daf8f163e0edb5
Reviewed-on: https://chromium-review.googlesource.com/1177198Reviewed-by: Adam Klein <adamk@chromium.org>
Commit-Queue: Deepti Gandluri <gdeepti@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55175}

Change-Id: I55d15fd15cc714732139e4bf12bd75f21f922048
Reviewed-on: https://chromium-review.googlesource.com/1174013Reviewed-by: Ben Titzer <titzer@chromium.org>
Reviewed-by: Bill Budge <bbudge@chromium.org>
Commit-Queue: Deepti Gandluri <gdeepti@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55174}

This reverts commit 5d69010e.

Reason for revert: New test fails on ARM GC stress bot - https://ci.chromium.org/p/v8/builders/luci.v8.ci/V8%20Arm%20GC%20Stress/8054

Original change's description:
> [asmjs] Properly validate asm.js heap sizes
> 
> Enforce both engine limitations and spec (http://asmjs.org/spec/latest/)
> limitations on the size of asm.js heaps.
> 
> R=​clemensh@chromium.org
> CC=​​mstarzinger@chromium.org
> 
> Bug: chromium:873600
> Change-Id: I104c23bbd0a9a7c494f97f8f9e83ac5a37496dfd
> Reviewed-on: https://chromium-review.googlesource.com/1174411
> Commit-Queue: Ben Titzer <titzer@chromium.org>
> Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#55163}

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

Change-Id: I95ca5306a495bfc0f78d7a29f5d6269fc9c0bdfa
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: chromium:873600
Reviewed-on: https://chromium-review.googlesource.com/1178141Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55173}

Change-Id: I62ddddf64d4de79765469e883295e246a18d7f84
Reviewed-on: https://chromium-review.googlesource.com/1177749Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55172}

Bug: v8:7790
Change-Id: I18512b508127c48ab0a1dc5a6a221d0f491bb5fe
Reviewed-on: https://chromium-review.googlesource.com/1175917
Commit-Queue: Georg Neis <neis@chromium.org>
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55171}

Change-Id: I3c04e3cedfa220d58eb1307977b99869485c7f4d
Reviewed-on: https://chromium-review.googlesource.com/1177744Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55170}

BUG=v8:7308

Change-Id: I36dda6606aecb9e8e2e9604c49e62ec70e3aee29
Reviewed-on: https://chromium-review.googlesource.com/1174447
Commit-Queue: Marja Hölttä <marja@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55169}

Don't compute the ToNumber conversion of long strings as it is
expensive.

Bug: v8:7790
Change-Id: Ief104f9229f7f633e31d26c98ed24b08a161525b
Reviewed-on: https://chromium-review.googlesource.com/1177719Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55168}

This reverts commit 957854dd.

Reason for revert: breaks fuzzing builds => blocks rolling, crbug.com/874440

Original change's description:
> Reland "[cleanup] Reland: Remove deprecated functions"
> 
> This reverts commit 717b9385.
> 
> Reason for revert: Cast build is now fixed
> 
> Original change's description:
> > Revert "[cleanup] Reland: Remove deprecated functions"
> > 
> > This reverts commit c8376b00.
> > 
> > Reason for revert: Still borked: https://ci.chromium.org/p/chromium/builders/luci.chromium.try/cast_shell_linux/114796
> > 
> > Original change's description:
> > > [cleanup] Reland: Remove deprecated functions
> > > 
> > > This is reland of https://chromium-review.googlesource.com/c/v8/v8/+/1154915
> > > with no changes since the break in chromium for ChromeOS is now fixed.
> > > 
> > > Removes all V8_DEPRECATED functions that weren't recently marked as well
> > > any V8_DEPRECATE_SOON function that relied on using using the address of
> > > an object to get hold of the Isolate.
> > > 
> > > Bug: v8:7786
> > > Cq-Include-Trybots: luci.chromium.try:linux_chromium_rel_ng;luci.chromium.try:linux-chromeos-dbg;luci.chromium.try:linux-chromeos-rel
> > > Change-Id: Ib62d38b9201fd0dab719948cb5ae5a0a164f7013
> > > Reviewed-on: https://chromium-review.googlesource.com/1172350
> > > Reviewed-by: Yang Guo <yangguo@chromium.org>
> > > Commit-Queue: Dan Elphick <delphick@chromium.org>
> > > Cr-Commit-Position: refs/heads/master@{#55119}
> > 
> > TBR=yangguo@chromium.org,delphick@chromium.org
> > 
> > Change-Id: Id1308a694092acfc90a3e7183d66c002feb63999
> > No-Presubmit: true
> > No-Tree-Checks: true
> > No-Try: true
> > Bug: v8:7786
> > Cq-Include-Trybots: luci.chromium.try:linux_chromium_rel_ng;luci.chromium.try:linux-chromeos-dbg;luci.chromium.try:linux-chromeos-rel
> > Reviewed-on: https://chromium-review.googlesource.com/1174751
> > Reviewed-by: Leszek Swirski <leszeks@chromium.org>
> > Commit-Queue: Leszek Swirski <leszeks@chromium.org>
> > Cr-Commit-Position: refs/heads/master@{#55127}
> 
> TBR=yangguo@chromium.org,leszeks@chromium.org,delphick@chromium.org
> 
> Change-Id: Id65dae1abdad6f854afec9eb59ed2bddd9246f79
> No-Presubmit: true
> No-Tree-Checks: true
> No-Try: true
> Bug: v8:7786
> Cq-Include-Trybots: luci.chromium.try:linux_chromium_rel_ng;luci.chromium.try:linux-chromeos-dbg;luci.chromium.try:linux-chromeos-rel
> Reviewed-on: https://chromium-review.googlesource.com/1175721
> Reviewed-by: Dan Elphick <delphick@chromium.org>
> Commit-Queue: Dan Elphick <delphick@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#55136}

TBR=yangguo@chromium.org,leszeks@chromium.org,delphick@chromium.org

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

Bug: v8:7786
Change-Id: I5dc792a3a1c986b8609487ca6ad1e485a8940521
Cq-Include-Trybots: luci.chromium.try:linux_chromium_rel_ng;luci.chromium.try:linux-chromeos-dbg;luci.chromium.try:linux-chromeos-rel
Reviewed-on: https://chromium-review.googlesource.com/1177661Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55167}

Fix 0027c834

FLAG_runtime_stats was declared as Int but it was accessed as
pointer. On 64-bit architectures pointer access needs to be
eight byte aligned. This created unaligned memory access
on 64-bit architectures for those architectures that do not
support unaligned memory access.

TEST=mjsunit/wasm/table,cctest/test-accessors/AccessorIC

Change-Id: I569b69583de98b4c5fb7266f23f927bbd006966d
Reviewed-on: https://chromium-review.googlesource.com/1177601
Commit-Queue: Ivica Bogosavljevic <ibogosavljevic@wavecomp.com>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55166}

R=ahaas@chromium.org

Bug: chromium:751825, chromium:773631
Change-Id: I87f6e9859b6adfe46adde7bf08fd16978035aa1f
Reviewed-on: https://chromium-review.googlesource.com/1177702Reviewed-by: Andreas Haas <ahaas@chromium.org>
Commit-Queue: Ben Titzer <titzer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55165}

Forcing it seems unnecessary and hinders concurrent compilation.

Also turn a related condition into a CHECK.

Bug: v8:7790
Change-Id: Ie7d7e47e6bc2743d742cfe07e65436c1b8b994f3
Reviewed-on: https://chromium-review.googlesource.com/1177705Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55164}

Enforce both engine limitations and spec (http://asmjs.org/spec/latest/)
limitations on the size of asm.js heaps.

R=clemensh@chromium.org
CC=​mstarzinger@chromium.org

Bug: chromium:873600
Change-Id: I104c23bbd0a9a7c494f97f8f9e83ac5a37496dfd
Reviewed-on: https://chromium-review.googlesource.com/1174411
Commit-Queue: Ben Titzer <titzer@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55163}

Bug: v8:8062
Change-Id: I5a5c39c0b5cffdcb15444caa670919be6fc3d007
Reviewed-on: https://chromium-review.googlesource.com/1171199
Commit-Queue: John Barboza <jbarboza@ca.ibm.com>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55162}

{AsyncCompileJob::FinishCompile} assumes that a context is set on the
isolate when it is called. This was not the case when it was called at
the end of streaming compilation.

R=mstarzinger@chromium.org

Bug: chromium:874525
Change-Id: Ia31cd9eb40598918262ff14606796027a6c80bc0
Reviewed-on: https://chromium-review.googlesource.com/1177392
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55161}

Change-Id: I76264a2f912eaac0ca913004fe9ec1f57d03ecb9
Reviewed-on: https://chromium-review.googlesource.com/1177390Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Commit-Queue: Bret Sepulveda <bsep@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55160}

The proposal is currently at Stage 3 of the TC39 process.
Repository: https://github.com/tc39/proposal-global

Bug: v8:5537
Change-Id: I36c39fdab049497f50685c6672655b67ec4d8ce9
Reviewed-on: https://chromium-review.googlesource.com/1174113
Commit-Queue: Mathias Bynens <mathias@chromium.org>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55159}

We really want to catch such errors. (std::optional throws an
exception in some of these cases.)

Change-Id: I7f8c3aff38aed1b3cbe52bcfb92062268fd3b201
Reviewed-on: https://chromium-review.googlesource.com/1177387Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55158}