These tests still fail on arm simulators and don't appear easily fixable
but are low priority. Let's still run them on other build configs.

Bug: v8:8917
Change-Id: If0a2f44b746eff5e82eb750103304e788dfbbfb5
Reviewed-on: https://chromium-review.googlesource.com/c/1491593Reviewed-by: Sigurd Schneider <sigurds@chromium.org>
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59903}

Happily, with the port of Array.prototype.find and findIndex, we can
remove a large set of library functions from array-builtins-gen.cc.

BUG: v8:7672
Change-Id: I74e07fe00162b34b2246c868386d4551ba4dc032
Reviewed-on: https://chromium-review.googlesource.com/c/1484296
Commit-Queue: Michael Stanton <mvstanton@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59902}

This is a reland of 19291bfc

Same as original, but with ThrowTypeError/ThrowRange updated to use an implicit context.

Original change's description:
> [typedarray] Port TA#subarray and TypedArraySpeciesCreate to Torque
>
> Reduces TypedArrayPrototypeSubArray builtin size by 392 bytes:
>   - TFJ Builtin, TypedArrayPrototypeSubArray, 2448 -> 2056
>
> Small 3-4% perf increase on JSTests/TypedArrays/SubarrayNoSpecies benchmark
>
> Bug: v8:7161, v8:8906
> Change-Id: Ia2b906a93db7199ca4592c46c40638cca0a33eec
> Reviewed-on: https://chromium-review.googlesource.com/c/1485241
> Reviewed-by: Jakob Gruber <jgruber@chromium.org>
> Reviewed-by: Peter Marshall <petermarshall@chromium.org>
> Reviewed-by: Simon Zünd <szuend@chromium.org>
> Commit-Queue: Peter Wong <peter.wm.wong@gmail.com>
> Cr-Commit-Position: refs/heads/master@{#59894}

Bug: v8:7161, v8:8906
Change-Id: Ic3784e2d4db262b1968ba467b7b46b98203f11d4
Reviewed-on: https://chromium-review.googlesource.com/c/1491533Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Commit-Queue: Peter Wong <peter.wm.wong@gmail.com>
Cr-Commit-Position: refs/heads/master@{#59901}

Keeping the {owned_code_} vector sorted might add unnecessary work
executed during compilation and under a mutex.
This CL moves the sort operation into {Lookup()}, such that it can be
executed in bulks and at later stages.

R=mstarzinger@chromium.org

Bug: v8:8916
Change-Id: I8d5f4520e4ce087234c0a1e3d97e7e98229206eb
Reviewed-on: https://chromium-review.googlesource.com/c/1476994
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59900}

This CL changes a few AST nodes and one internal structure to use "Identifier"
instead of a simple std::string, allowing the use of the exact source position
of such a name.

Drive-by change: Add new constructor to Binding that allows creation from
an Identifier. It sets the declaration_position to the source position of
the name instead of using "CurrentSourcePosition".

R=tebbi@chromium.org

Bug: v8:7793
Change-Id: I456d20822b6528d2e96400c28ebfebea3ca80613
Reviewed-on: https://chromium-review.googlesource.com/c/1491223
Commit-Queue: Simon Zünd <szuend@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59899}

This roughly takes 40% less time.

Change-Id: I7886bd85cd33c9b2d2225e0f207a3e3bf89f1ef3
Reviewed-on: https://chromium-review.googlesource.com/c/1491511
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59898}

AdvanceUntil always starts at the character after c0_. This means that we
needed to handle first, causing some duplication. Instead of doing that, we can
also just not Advance() before AdvanceUntil, making c0_ a character that's
already handled.

Change-Id: I3e23f62a617b5d607579641fc19b12de4f179e8e
Reviewed-on: https://chromium-review.googlesource.com/c/1491512
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59897}

This reverts commit 19291bfc.

Reason for revert: https://logs.chromium.org/logs/v8/buildbucket/cr-buildbucket.appspot.com/8920369361383698384/+/steps/build/0/steps/compile/0/stdout

ThrowTypeError's method signature changed this morning


Original change's description:
> [typedarray] Port TA#subarray and TypedArraySpeciesCreate to Torque
> 
> Reduces TypedArrayPrototypeSubArray builtin size by 392 bytes:
>   - TFJ Builtin, TypedArrayPrototypeSubArray, 2448 -> 2056
> 
> Small 3-4% perf increase on JSTests/TypedArrays/SubarrayNoSpecies benchmark
> 
> Bug: v8:7161, v8:8906
> Change-Id: Ia2b906a93db7199ca4592c46c40638cca0a33eec
> Reviewed-on: https://chromium-review.googlesource.com/c/1485241
> Reviewed-by: Jakob Gruber <jgruber@chromium.org>
> Reviewed-by: Peter Marshall <petermarshall@chromium.org>
> Reviewed-by: Simon Zünd <szuend@chromium.org>
> Commit-Queue: Peter Wong <peter.wm.wong@gmail.com>
> Cr-Commit-Position: refs/heads/master@{#59894}

TBR=peter.wm.wong@gmail.com,jgruber@chromium.org,petermarshall@chromium.org,szuend@chromium.org

Change-Id: Ic0eaa07e57df3c365b52fb3c5de8eb7c3d9f71e9
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:7161, v8:8906
Reviewed-on: https://chromium-review.googlesource.com/c/1491532Reviewed-by: Peter Wong <peter.wm.wong@gmail.com>
Commit-Queue: Peter Wong <peter.wm.wong@gmail.com>
Cr-Commit-Position: refs/heads/master@{#59896}

TBR=sergiyb@chromium.org
NOTRY=true

Bug: chromium:933093
Change-Id: I7728b81a48da401d65f63b0450df4119bd04d0f8
Reviewed-on: https://chromium-review.googlesource.com/c/1491515Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59895}

Reduces TypedArrayPrototypeSubArray builtin size by 392 bytes:
  - TFJ Builtin, TypedArrayPrototypeSubArray, 2448 -> 2056

Small 3-4% perf increase on JSTests/TypedArrays/SubarrayNoSpecies benchmark

Bug: v8:7161, v8:8906
Change-Id: Ia2b906a93db7199ca4592c46c40638cca0a33eec
Reviewed-on: https://chromium-review.googlesource.com/c/1485241Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Reviewed-by: Simon Zünd <szuend@chromium.org>
Commit-Queue: Peter Wong <peter.wm.wong@gmail.com>
Cr-Commit-Position: refs/heads/master@{#59894}

Change-Id: I7e73b1f9cd81c91b5399f1cd01eb3bd6766025d5
Reviewed-on: https://chromium-review.googlesource.com/c/1490601Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Commit-Queue: Nathan Rogers <nathanrogers@google.com>
Cr-Commit-Position: refs/heads/master@{#59893}

R=ahaas@chromium.org
TEST=mjsunit/regress/wasm/regress-8896
BUG=v8:8896

Change-Id: Id942b95ac05226206a08f0a5e516b9072a1a7f6f
Reviewed-on: https://chromium-review.googlesource.com/c/1491220
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59892}

The spec repo version in DEPS now gets updated automatically by the
autoroller, but we still have to update the spec tests manually because
it requires ocaml. Updating the core spec tests is what this CL does.

There is a bug to also do this update automatically. It's on Sergiy's
list but does not have the highest priority.

R=titzer@chromium.org

Change-Id: I65085dcbca93d41d9f12c5ba227130197ebd203f
Reviewed-on: https://chromium-review.googlesource.com/c/1491219Reviewed-by: Ben Titzer <titzer@chromium.org>
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59891}

Bug: v8:7793
Change-Id: I503622356746acbeaaeca88ce5bacf7ab9c93ab8
Reviewed-on: https://chromium-review.googlesource.com/c/1491215Reviewed-by: Simon Zünd <szuend@chromium.org>
Commit-Queue: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59890}

Change-Id: I5f0d915351c24b9a2916b8ab1d4bafb4d7eb21c7
Reviewed-on: https://chromium-review.googlesource.com/c/1491217Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Commit-Queue: Michael Stanton <mvstanton@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59889}

TBR=sergiyb@chromium.org

Bug: chromium:929126
Change-Id: I7f3bda2172ecf78db942b3de86920d8ddd69769b
Reviewed-on: https://chromium-review.googlesource.com/c/1491216
Commit-Queue: Sergiy Belozorov <sergiyb@chromium.org>
Reviewed-by: Sergiy Belozorov <sergiyb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59888}

We don't allocate executable memory in jitless mode hence there's no
need to flush the icache.

Bug: v8:7777
Change-Id: I70a1884e6c9f11405465f5741f2eccd4f7a273fb
Reviewed-on: https://chromium-review.googlesource.com/c/1488765
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Sigurd Schneider <sigurds@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59887}

Moved CoverageMode and TypeProfileMode enums to interface-types.h
to save one include in isolate.h. This reduces the expanded lines of code
count by ~45k.

Bug: v8:8834

R=yangguo@chromium.org

Change-Id: I399fe8cf66b1aec79bcb5831afd46a74e358244d
Reviewed-on: https://chromium-review.googlesource.com/c/1489072Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Maya Lekova <mslekova@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59886}

We didn't update the arguments count properly when changing the JSCall
node to a direct Call node.

Bug: chromium:936302, v8:8895
Change-Id: I59a39a07e41151d8eaa2e1a1ea7b1835e00fb501
Reviewed-on: https://chromium-review.googlesource.com/c/1491191Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59885}

This is a reland of 734a6575

Original change's description:
> Do not enqueue or run a microtask on detached contexts
>
> This CL disables EnqueueMicrotask and RunMicrotasks on detached
> contexts. That is, if an embedder call DetachGlobal() on a v8::Context,
> EnqueueMicrotask on that context will not take effect, and all Microtask
> that is enqueued before DetachGlobal will be cancelled.
>
> On Blink, this implies that a frame will no longer run a microtask after
> it's navigated away. OTOH, detached frames in Blink are not affected.
>
> Bug: v8:8124
> Change-Id: I5b00ceef5ea2afb87cf067a65eb95c29bf91176d
> Reviewed-on: https://chromium-review.googlesource.com/c/1416071
> Reviewed-by: Toon Verwaest <verwaest@chromium.org>
> Reviewed-by: Yang Guo <yangguo@chromium.org>
> Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
> Reviewed-by: Adam Klein <adamk@chromium.org>
> Commit-Queue: Taiju Tsuiki <tzik@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#59445}

Tbr: adamk@chromium.org, yangguo@chromium.org, verwaest@chromium.org
Bug: v8:8124
Change-Id: I959a18ae214f1385d5f453b3ed94772e60f71e0f
Reviewed-on: https://chromium-review.googlesource.com/c/1469544
Commit-Queue: Taiju Tsuiki <tzik@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59884}

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/ebd384a..7cd7119

Rolling v8/test/wasm-js/data: https://chromium.googlesource.com/external/github.com/WebAssembly/spec/+log/4da0540..44dfa15

Rolling v8/third_party/catapult: https://chromium.googlesource.com/catapult/+log/a4323c9..f610057

Rolling v8/third_party/depot_tools: https://chromium.googlesource.com/chromium/tools/depot_tools/+log/95ea36e..be28670

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

Change-Id: If1a818f05981ae7b58c117498fef2829ebbd909f
Reviewed-on: https://chromium-review.googlesource.com/c/1490598Reviewed-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@{#59883}

The master protocol description file is js_protocol.pdl, not .json

TBR=yangguo@chromium.org

Change-Id: Ibaef314a63c3e1665ed56bc8c66ca18a00c7fd4f
Reviewed-on: https://chromium-review.googlesource.com/c/1489976Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
Commit-Queue: Alexei Filippov <alph@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59882}

This adds support for dynamically checking the newly introduced
is_safe_to_skip_adapt_arguments flag on the SharedFunctionInfo inside
the ArgumentsAdaptorTrampoline builtin, so that if there's an arguments
mismatch, but said bit is set, we can just massage the current stack
frame according to the SharedFunctionInfo and don't need to create an
arguments adaptor frame.

This improves the general (baseline) performance of calls with arguments
mismatches by up to 35%, as can be seen with the test case from the tracking
bug, which goes from around

  callUnderApplication: 608 ms.
  callOverApplication1: 633 ms.
  callOverApplication2: 635 ms.

to

  callUnderApplication: 390 ms.
  callOverApplication1: 439 ms.
  callOverApplication2: 443 ms.

when the TurboFan fast-path (that was previously introduced) is forcibly
disabled. That's a pretty solid baseline improvement and there's probably
still some room for further improvement (i.e. avoid loading the SFI multiple
times, etc.).

Drive-by-fix: Refactor and cleanup the ArgumentsAdaptorTrampoline
builtin a bit to make it more efficient and easier to read (it's still
pretty messy, but I don't wanna change too many things at once).

This is only the initial x64 port, since for ia32 we're really short on
registers and it might not even pay off (initial prototype shows a lot
less performance impact). The arm and arm64 port is in progress and will
land once ready.

Bug: v8:8834, v8:8895
Change-Id: I2e1c8e4767a808a43b932487fdedc0e44cdd35c5
Reviewed-on: https://chromium-review.googlesource.com/c/1488751
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59881}

OS::Allocate() previously was calling zx_vmo_replace_as_executable()
when executable access is requested. This breaks the case when the
OS::SetPermission() is called to mark that memory as executable later.
Updated it to call zx_vmo_replace_as_executable() for all VMOs.

This solution is not ideal, but it's consistent with other platforms,
so it's acceptable short-term.

Bug: v8:8899, chromium:934582
Change-Id: Ifeb818c93d8b9c80e73a057f5e6f3ca5a7b1c23f
Reviewed-on: https://chromium-review.googlesource.com/c/1483613Reviewed-by: Wez <wez@chromium.org>
Commit-Queue: Sergey Ulanov <sergeyu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59880}

TBR=petermarshall@chromium.org

Change-Id: I663735761c4ae730337b1381b52c99371eae2951
Notry: true
Bug: v8:5193
Reviewed-on: https://chromium-review.googlesource.com/c/1489084Reviewed-by: Sigurd Schneider <sigurds@chromium.org>
Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59879}

This one fails on Windows.

Bug: v8:5193
Change-Id: Ib028f8d7aa8a2d69a7324f9fcc6c5d03bc6f368c
Notry: true
Reviewed-on: https://chromium-review.googlesource.com/c/1489081
Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
Reviewed-by: Sigurd Schneider <sigurds@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59878}

R=mslekova@chromium.org

Bug: v8:8834
Change-Id: I51ff4441a80fd92bbdf400b5b92ff2d399250864
Reviewed-on: https://chromium-review.googlesource.com/c/1489077Reviewed-by: Maya Lekova <mslekova@chromium.org>
Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59877}

This one still fails too, whoops.

Bug: v8:5193
Change-Id: I07c0e55c8a1ca59311e0110c851b38bd9028c20f
Notry: true
Reviewed-on: https://chromium-review.googlesource.com/c/1489079
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
Reviewed-by: Sigurd Schneider <sigurds@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59876}

Change-Id: I4bd02bdb68727b6242b0fe4b81fd522813b13f39
Bug: v8:8834
Reviewed-on: https://chromium-review.googlesource.com/c/1488755Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59875}

This one still fails, whoops.

Bug: v8:5193
Notry: true
Change-Id: Icd7ac2931e08efd176f0d37aea07c9bf30991d9b
Reviewed-on: https://chromium-review.googlesource.com/c/1489078Reviewed-by: Sigurd Schneider <sigurds@chromium.org>
Commit-Queue: Sigurd Schneider <sigurds@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59874}

I can't reproduce any of these flakes anymore on windows or linux.
Some are confirmed fixed with the same root cause as crbug.com/v8/8883.
Others are not reproducible anymore and were probably fixed by other
de-flaking and bugfixes in the last 6 months.

Bug: v8:5193, v8:7054
Change-Id: I23ce47a98f11f3637ccf4baf01ffab5c461a0ebd
Reviewed-on: https://chromium-review.googlesource.com/c/1489074Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59873}

NOTRY=true

Bug: v8:8889
Change-Id: I1faf4bcb8f573485915a8b79d551fbb4985a02a0
Reviewed-on: https://chromium-review.googlesource.com/c/1489075Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59872}

We somehow forgot to thread through the VectorSlotPair for the CALL_IC
based speculation feedback to CheckedTaggedToTaggedPointer. This was
showing for example with `String#concat()` where we ended up with an
endless deoptimization loop if the parameter was a Smi.

Bug: v8:8913
Change-Id: I84d90403f6fada9b435d4eb71c689edc3c34dc86
Reviewed-on: https://chromium-review.googlesource.com/c/1488770
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Mathias Bynens <mathias@chromium.org>
Reviewed-by: Sigurd Schneider <sigurds@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59871}

V8 used to use the microtask context when it runs EnqueueJob
step 2.
> Let job settings be some appropriate environment settings object.
https://html.spec.whatwg.org/multipage/webappapis.html#enqueuejob(queuename,-job,-arguments)

However, it's being updated to use the handler's context.
https://github.com/whatwg/html/issues/1426#issuecomment-340071080

Change-Id: I24840a28ef2c903539fe4ace74ae59da290f5109
Reviewed-on: https://chromium-review.googlesource.com/c/1465902Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Taiju Tsuiki <tzik@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59870}

R=mlippautz@chromium.org

Change-Id: Ic1d2fce007ddcb72f56ad257032e434c575a3f8d
Reviewed-on: https://chromium-review.googlesource.com/c/1456104
Commit-Queue: Yang Guo <yangguo@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59869}

The logic for removing while iterating is non-standard and
a left over from a previous index based loop. This patch
replaces it with a standard erase based version.

This fixes a runtime crash with MSVC that invalidates the
iterator and then asserts. This also makes the code safe
in case the last move can be redundant.

Change-Id: Ie6990e0d65a3b83a4b7da3e2e89ed4e60a6cd215
Reviewed-on: https://chromium-review.googlesource.com/c/1488762Reviewed-by: Ben Titzer <titzer@chromium.org>
Commit-Queue: Ben Titzer <titzer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59868}

Bug: v8:8834
Change-Id: I4d57b15f2d5058511a2c474897a52cac236a6a00
Reviewed-on: https://chromium-review.googlesource.com/c/1488767Reviewed-by: Sigurd Schneider <sigurds@chromium.org>
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59867}

GetSymbol previously always internalized the underlying string, even if the
preparser does not need it. The most common case where this isn't needed is
property name parsing. This seems to speed up preparsing quite a bit.

For future reference: Property names in object literals still are needed due to
various checks (e.g., get 'constructor', duplicate __proto__, ...); as well as
cover grammar parsing (property names can turn into variable references). If we
turn all strings that the preparser needs to identify back into contextual
keywords we may be able to avoid the former.

Change-Id: I549e4600053de3136ca08d4915cc04db36d66a89
Reviewed-on: https://chromium-review.googlesource.com/c/1488764Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59866}

This CL introduces a new expression that can replace "std::string"
fields in other expressions. The main goal is to get SourcePositions
for identifiers to make them available in the language server.

The CL introduces a separate symbol "name", that allows to
incrementellay replace strings with name expression where needed. As
an example, variable delcarations now use a NameExpression for the
variable name.

R=danno@chromium.org, tebbi@chromium.org

Bug: v8:7793
Change-Id: I5b88bbaeac597b8e9760d2e01880e5e599ebf802
Reviewed-on: https://chromium-review.googlesource.com/c/1488752
Commit-Queue: Simon Zünd <szuend@chromium.org>
Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59865}

... which always contains constant value.

Bug: v8:8834
Change-Id: I27af24d07371b112d48eaab4d3a782a74af5fb20
Reviewed-on: https://chromium-review.googlesource.com/c/1487611Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Igor Sheludko <ishell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59864}