Reland of land "Turn libbase into a component" (patchset #1 id:1 of https://codereview.chromium.org/2396933002/ )

Reason for revert:
let's see whether it sticks this time

Original issue's description:
> Revert of Reland "Turn libbase into a component" (patchset #1 id:1 of https://codereview.chromium.org/2395553002/ )
>
> Reason for revert:
> Speculative revert due to very strange-looking win/dbg failures
> which reference SignedDivisionByConstant:
>
> https://build.chromium.org/p/client.v8/builders/V8%20Win64%20-%20debug/builds/12736
>
> Original issue's description:
> > Reland "Turn libbase into a component"
> >
> > Original issue's description:
> > > Turn libbase into a component
> > >
> > > This is a precondition for turning libplatform into a component
> > >
> > > BUG=v8:5412
> > > R=jgruber@chromium.org,machenbach@chromium.org
> > > CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_chromium_compile_
> > dbg_ng;master.tryserver.chromium.android:android_clang_dbg_recipe
> > >
> > > Committed: https://crrev.com/614e615775f732d71b5ee94ed29737d8de687104
> > > Cr-Commit-Position: refs/heads/master@{#39950}
> >
> > BUG=v8:5412
> > TBR=jgruber@chromium.org,machenbach@chromium.org
> > CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_chromium_compile_dbg_ng;master.tryserver.chromium.android:android_clang_dbg_recipe;master.tryserver.chromium.mac:mac_chromium_compile_dbg_ng
> >
> > Committed: https://crrev.com/17cb51254cafa932025e9980b60f89f756d411cb
> > Cr-Commit-Position: refs/heads/master@{#39969}
>
> TBR=jgruber@chromium.org,machenbach@chromium.org,jochen@chromium.org
> # Skipping CQ checks because original CL landed less than 1 days ago.
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=v8:5412
>
> Committed: https://crrev.com/e75b9f6ed5da39e6c7a8d70cf48afbc9958afc85
> Cr-Commit-Position: refs/heads/master@{#40009}

TBR=jgruber@chromium.org,machenbach@chromium.org,adamk@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=v8:5412

Review-Url: https://codereview.chromium.org/2399323002
Cr-Commit-Position: refs/heads/master@{#40068}

 - Added gating code in the module-decoder to allow SIMD code only when
 it can be decoded correctly
 - SIMD128 values should not be exported to JS
 - Try/Catch should not be available in asmjs modules
 - Trivial fixes for S128  values

BUG=chromium:648079

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

Review-Url: https://codereview.chromium.org/2400863003
Cr-Commit-Position: refs/heads/master@{#40067}

Review-Url: https://codereview.chromium.org/2399933005
Cr-Commit-Position: refs/heads/master@{#40066}

Rolling v8/build: https://chromium.googlesource.com/chromium/src/build/+log/67604e1..792a87c

Rolling v8/tools/clang: https://chromium.googlesource.com/chromium/src/tools/clan/+log/1f92f99..30c5a8b

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

Review-Url: https://codereview.chromium.org/2393083006
Cr-Commit-Position: refs/heads/master@{#40065}

Only subset of internal properties can be useful in preview, report only them.

BUG=chromium:653610
R=dgozman@chromium.org

Review-Url: https://codereview.chromium.org/2399003003
Cr-Commit-Position: refs/heads/master@{#40064}

Strongly typing module_bytes needs a patch for the
serialization code.

Serialization bypasses module bytes, so their presence can't
be compulsory.

BUG=

Review-Url: https://codereview.chromium.org/2397303002
Cr-Commit-Position: refs/heads/master@{#40063}

Use information in the WasmCompiledModule instead.

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

Review-Url: https://codereview.chromium.org/2396043002
Cr-Commit-Position: refs/heads/master@{#40062}

I am removing three fields from the wasm object in a follow-up commit,
and using information in the compiled module instead. In order to not
weaken the verification, this commit adds appropriate checks on the
compiled module.

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

Review-Url: https://codereview.chromium.org/2394663008
Cr-Commit-Position: refs/heads/master@{#40061}

Enable the --harmony-string-padding flag by default

BUG=v8:4954
R=adamk@chromium.org, littledan@chromium.org

Review-Url: https://codereview.chromium.org/2382193002
Cr-Commit-Position: refs/heads/master@{#40060}

Port 0c168a90

R=tebbi@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, bjaideep@ca.ibm.com, michael_dawson@ca.ibm.com, mbrandy@us.ibm.com
BUG=

Review-Url: https://codereview.chromium.org/2397193003
Cr-Commit-Position: refs/heads/master@{#40059}

One step closer to the informally-agreed upon specification
that structured cloning will always succeed, meaning, if
we fail to deserialize (e.g. because version mismatch in
serialized format and v8 version), we recompile.

As part of this work, the deserializer will need to become
more resilient to invalid input data, and fail graciously
rather than CHECK-ing. This CL addresses some of that,
sufficient to unblock the current serialization tests.
Subsequent CLs will add more testing and the appropriate
fixes.

BUG=639090

Review-Url: https://codereview.chromium.org/2395793003
Cr-Commit-Position: refs/heads/master@{#40058}

d8 now elides './' when constructing absolute paths.
'../' is still not normalized.

R=neis@chromium.org
BUG=v8:1569

Review-Url: https://codereview.chromium.org/2393243002
Cr-Commit-Position: refs/heads/master@{#40057}

This patch sets `this` to be undefined when calling resolve and reject
functions attached to the deferred.

BUG=v8:5476

Review-Url: https://codereview.chromium.org/2399053003
Cr-Commit-Position: refs/heads/master@{#40056}

Introduce AccessCompilerData which hangs off the Isolate, and initialize
it when the first PropertyAccessCompiler is instantiated. This avoids
TSAN failures when trying to access load/store calling convention arrays.

BUG=v8:5427

Review-Url: https://codereview.chromium.org/2389313002
Cr-Commit-Position: refs/heads/master@{#40055}

A new V8 API object v8::TracingCpuProfiler is introduced.
Client can create it on an isolate to enable JS CPU profiles collected
during tracing session.

Once the v8.cpu_profile2 tracing category is enabled the profiler emits
CpuProfile and CpuProfileChunk events with the profile data.

BUG=chromium:406277

Review-Url: https://codereview.chromium.org/2396733002
Cr-Commit-Position: refs/heads/master@{#40054}

R=ishell@chromium.org

Review-Url: https://codereview.chromium.org/2395003002
Cr-Commit-Position: refs/heads/master@{#40053}

TBR=dgozman@chromium.org

Review-Url: https://codereview.chromium.org/2397193002
Cr-Commit-Position: refs/heads/master@{#40052}

BUG=v8:5431

Review-Url: https://codereview.chromium.org/2372113004
Cr-Commit-Position: refs/heads/master@{#40051}

Imports and exports in 0xC can be much more than functions, including
tables, memories, and globals. This CL refactors the underlying
organization of imports and exports to support these new import types.

BUG=

Committed: https://crrev.com/599f8a83420346d9cba5ff97bd2a7520468207b6
Review-Url: https://codereview.chromium.org/2390113003
Cr-Original-Commit-Position: refs/heads/master@{#40033}
Cr-Commit-Position: refs/heads/master@{#40050}

BUG=chromium:406277

Review-Url: https://codereview.chromium.org/2399463004
Cr-Commit-Position: refs/heads/master@{#40049}

BUG=v8:5409

Committed: https://crrev.com/a124feb0760896c8be61de08004a08c3bc9b4b3f
Review-Url: https://codereview.chromium.org/2348303002
Cr-Original-Commit-Position: refs/heads/master@{#39633}
Cr-Commit-Position: refs/heads/master@{#40048}

There's no point going through all the checks in the Add stub when we
already know that both sides are strings.

Review-Url: https://codereview.chromium.org/2395083002
Cr-Commit-Position: refs/heads/master@{#40047}

Caught with libfuzzer.

BUG=chromium:148757

Review-Url: https://codereview.chromium.org/2394983002
Cr-Commit-Position: refs/heads/master@{#40046}

This enables the {BytecodeGraphBuilder} whenever heuristics in the
compilation pipeline determine both Ignition and TurboFan to be used.
There no longer needs to be an explicit flag passed in order to build
graphs from bytecode.

R=bmeurer@chromium.org

Review-Url: https://codereview.chromium.org/2363413005
Cr-Commit-Position: refs/heads/master@{#40045}

BUG=v8:5409

Committed: https://crrev.com/37c688a24578e787d3d8941093563ed049c3497e
Review-Url: https://codereview.chromium.org/2335343007
Cr-Original-Commit-Position: refs/heads/master@{#39631}
Cr-Commit-Position: refs/heads/master@{#40044}

Revert of [heap] Concurrent slot filtering in sweeper threads. (patchset #4 id:60001 of https://codereview.chromium.org/2401563002/ )

Reason for revert:
Crashing.

Original issue's description:
> [heap] Concurrent slot filtering in sweeper threads.
>
> This is an intermediate step for concurrent slot filtering. This CL already makes filtering concurrent, but does not integrate it in the actual sweeping. This will be done in two follow up CLs. One for the regular slot set and one for the typed slot set.
>
> BUG=chromium:648568
>
> Committed: https://crrev.com/1f89d369fc952a2826f9f62901fb84fcf30920d7
> Cr-Commit-Position: refs/heads/master@{#40040}

TBR=ulan@chromium.org,mlippautz@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:648568

Review-Url: https://codereview.chromium.org/2399003002
Cr-Commit-Position: refs/heads/master@{#40043}

Now that the scope chain is deserialized directly from the chain of
{ScopeInfo} objects, it is no longer needed to provide a context. This
makes the {AllowsLazyCompilationWithoutContext} predicate coincide with
the more general {AllowsLazyCompilation}. Remove the former.

R=jochen@chromium.org

Review-Url: https://codereview.chromium.org/2399853002
Cr-Commit-Position: refs/heads/master@{#40042}

With this CL, we devolve all Constants introduced as they are with an object handle into

* Range - for integers
* Nan
* MinusZero
* OtherNumberConstant - for doubles
* HeapConstant

We reduce the amount we have to inspect an object handle during optimization. Also, simplifications result. For example, you never have to check if a Range contains a HeapConstant.

BUG=

Review-Url: https://codereview.chromium.org/2381523002
Cr-Commit-Position: refs/heads/master@{#40041}

This is an intermediate step for concurrent slot filtering. This CL already makes filtering concurrent, but does not integrate it in the actual sweeping. This will be done in two follow up CLs. One for the regular slot set and one for the typed slot set.

BUG=chromium:648568

Review-Url: https://codereview.chromium.org/2401563002
Cr-Commit-Position: refs/heads/master@{#40040}

Recent changes in Segment class caused many tests to fail on mips32
because of an unaligned read error. Setting the alignment to 8 for mips
fixes the issue. Accessing doubles on mips32 must be eight bit aligned.

BUG=

Review-Url: https://codereview.chromium.org/2390303003
Cr-Commit-Position: refs/heads/master@{#40039}

Revert of [wasm] Refactor import handling for 0xC. (patchset #10 id:180001 of https://codereview.chromium.org/2390113003/ )

Reason for revert:
Failes a few GC stress tests.https://chromegw.corp.google.com/i/client.v8/builders/V8%20Linux%20-%20gc%20stress/builds/6253

Original issue's description:
> [wasm] Refactor import handling for 0xC.
>
> Imports and exports in 0xC can be much more than functions, including
> tables, memories, and globals. This CL refactors the underlying
> organization of imports and exports to support these new import types.
>
> BUG=
>
> Committed: https://crrev.com/599f8a83420346d9cba5ff97bd2a7520468207b6
> Cr-Commit-Position: refs/heads/master@{#40033}

TBR=mtrofin@chromium.org,ahaas@chromium.org,bradnelson@chromium.org,titzer@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=

Review-Url: https://codereview.chromium.org/2395133002
Cr-Commit-Position: refs/heads/master@{#40038}

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

Review-Url: https://codereview.chromium.org/2397153002
Cr-Commit-Position: refs/heads/master@{#40037}

Flag getters are implemented as TurboFan stubs while the rest are written as
C++. This distinction is somewhat arbitrary and more getters could be ported to
TurboFan in the future.

BUG=v8:5339

Review-Url: https://codereview.chromium.org/2389233002
Cr-Commit-Position: refs/heads/master@{#40036}

R=jarin@chromium.org
BUG=

Review-Url: https://codereview.chromium.org/2401553002
Cr-Commit-Position: refs/heads/master@{#40035}

BUG=chromium:648568

Review-Url: https://codereview.chromium.org/2397473004
Cr-Commit-Position: refs/heads/master@{#40034}

Imports and exports in 0xC can be much more than functions, including
tables, memories, and globals. This CL refactors the underlying
organization of imports and exports to support these new import types.

BUG=

Review-Url: https://codereview.chromium.org/2390113003
Cr-Commit-Position: refs/heads/master@{#40033}

In an anonymous namespace, all methods are already treated like being
static, so no need for these keywords.

Review-Url: https://codereview.chromium.org/2384403006
Cr-Commit-Position: refs/heads/master@{#40032}

This switches the {ParseInfo} constructor to always determine the outer
scope info from the shared function info instead of a concrete closure.
It is a precursor to deprecate the constructor taking closures entirely
and hence make the fact that we can parse without a closure explicit.

R=jochen@chromium.org
BUG=v8:2206

Review-Url: https://codereview.chromium.org/2397053003
Cr-Commit-Position: refs/heads/master@{#40031}

BUG=chromium:653264
TEST=cctest/test-run-wasm-module/GrowMemoryZero
R=titzer@chromium.org

Review-Url: https://codereview.chromium.org/2389263005
Cr-Commit-Position: refs/heads/master@{#40030}

BUG=
R=jarin@chromium.org

Review-Url: https://codereview.chromium.org/2393923003
Cr-Commit-Position: refs/heads/master@{#40029}