The embedder can control how many threads it wants to use via the
v8::Platform implementation. V8 internally doesn't spin up threads
anymore. If the embedder doesn't want to use any threads at all, it's
v8::Platform implementation must either run the background jobs on
the foreground thread, or the embedder should specify --predictable

BUG=none
R=yangguo@chromium.org
LOG=y

Review URL: https://codereview.chromium.org/1064723005

Cr-Commit-Position: refs/heads/master@{#27833}

An embedder that wants to avoid the check should use MaybeLocal::ToLocal.

BUG=none
R=dcarney@chromium.org
LOG=y

Review URL: https://codereview.chromium.org/1083943002

Cr-Commit-Position: refs/heads/master@{#27832}

As uClibc defines __GLIBC__ in an attempt to look like glibc, V8_LIBC_GLIBC
was true for uClibc as well. Checking for uClibc before glibc fixes this
and restores the correct behavior.

BUG=

Review URL: https://codereview.chromium.org/1066573005

Cr-Commit-Position: refs/heads/master@{#27806}

This allows the embedder to decide whether it's worthwhile to copy the
contents to avoid materializing a buffer.

BUG=v8:3996
R=dslomov@chromium.org,kbr@chromium.org
LOG=y

Review URL: https://codereview.chromium.org/1084513002

Cr-Commit-Position: refs/heads/master@{#27782}

When debugging Handle leaks in io.js we found it very convenient to be
able to Seal some specific (root in our case) scope to prevent Handle
allocations in it, and easily find leakage.

R=yangguo
BUG=

Review URL: https://codereview.chromium.org/1079713002

Cr-Commit-Position: refs/heads/master@{#27766}

This fixes the arm(64) and mips(64) write barriers

BUG=

Review URL: https://codereview.chromium.org/1073133002

Cr-Commit-Position: refs/heads/master@{#27751}

BUG=

Review URL: https://codereview.chromium.org/1074153002

Cr-Commit-Position: refs/heads/master@{#27750}

BUG=none
R=hpayer@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/1075133002

Cr-Commit-Position: refs/heads/master@{#27736}

gcc rejects the following snippet, clang rejects it in -std=c++11 mode:
  namespace A { template<class T> class C {}; }
  namespace B { template class A::C<int>; }

Indeed, the C++ standard says in 14.7.2p2 "An explicit instantiation shall
appear in an enclosing namespace of its template", so cl.exe is incorrect to
allow this.

Just move the instantiation out of the v8 namespace to fix.  No intended
behavior change.  Fixes building with clang-cl on Windows.

BUG=chromium:475643
LOG=N
TBR=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/1073903002

Cr-Commit-Position: refs/heads/master@{#27721}

Revert of Merge cellspace into old pointer space (patchset #8 id:180001 of https://codereview.chromium.org/1010803012/)

Reason for revert:
Causes test failures on ARM bots related to cells and write barriers.

Original issue's description:
> Merge cellspace into old pointer space
>
> BUG=
>
> Committed: https://crrev.com/4e7163ce05f135918205c7855ae60a48e5d46cc5
> Cr-Commit-Position: refs/heads/master@{#27707}

TBR=hpayer@chromium.org,balazs.kilvady@imgtec.com,yangguo@chromium.org,verwaest@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=

Review URL: https://codereview.chromium.org/1053243003

Cr-Commit-Position: refs/heads/master@{#27711}

BUG=

Review URL: https://codereview.chromium.org/1010803012

Cr-Commit-Position: refs/heads/master@{#27707}

BUG=chromium:452067
LOG=n

Committed: https://crrev.com/baf927ff5115ec62a6dad684b9232ed9d3960e3a
Cr-Commit-Position: refs/heads/master@{#27626}

Review URL: https://codereview.chromium.org/1045753002

Cr-Commit-Position: refs/heads/master@{#27674}

Revert of CpuProfiler: public API for deopt info in cpu profiler. (patchset #6 id:150001 of https://codereview.chromium.org/1045753002/)

Reason for revert:
[Sheriff] Breaks compile here:
http://build.chromium.org/p/client.v8/builders/V8%20Win32%20-%20nosnap%20-%20shared/builds/6115

Original issue's description:
> CpuProfiler: public API for deopt info in cpu profiler.
>
> BUG=chromium:452067
> LOG=n
>
> Committed: https://crrev.com/baf927ff5115ec62a6dad684b9232ed9d3960e3a
> Cr-Commit-Position: refs/heads/master@{#27626}

TBR=alph@chromium.org,jkummerow@chromium.org,svenpanne@chromium.org,yurys@chromium.org,loislo@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:452067

Review URL: https://codereview.chromium.org/1062053004

Cr-Commit-Position: refs/heads/master@{#27628}

BUG=chromium:452067
LOG=n

Review URL: https://codereview.chromium.org/1045753002

Cr-Commit-Position: refs/heads/master@{#27626}

Instead, please use v8::Isolate::RequestInterrupt to synchronize
to the main thread.

R=yurys@chromium.org
API=Removed v8::Debug::DebugBreakForCommand
LOG=Y

Review URL: https://codereview.chromium.org/1036863002

Cr-Commit-Position: refs/heads/master@{#27625}

This reverts commit cbfcee55.

BUG=

Review URL: https://codereview.chromium.org/1051233002

Cr-Commit-Position: refs/heads/master@{#27623}

The motivation is that we prefer to avoid creating internal properties, and we have a usable field on maps ("transitions", which is not used for prototype maps).
This CL also ensures the invariant that prototype maps are never shared, even if they are in dictionary mode.

Review URL: https://codereview.chromium.org/1033653002

Cr-Commit-Position: refs/heads/master@{#27617}

BUG=
TBR=machenbach@chromium.org,vogelheim@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/1059433002

Cr-Commit-Position: refs/heads/master@{#27604}

Revert of make ToLocalCheck crash in release mode (patchset #1 id:1 of https://codereview.chromium.org/1043363005/)

Reason for revert:
breaks some devtools things

Original issue's description:
> make ToLocalCheck crash in release mode
>
> R=svenpanne@chromium.org
> BUG=
>
> Committed: https://crrev.com/ce7cc5119c1e031bf1eb8476fbf5e55bef738f94
> Cr-Commit-Position: refs/heads/master@{#27585}

TBR=svenpanne@chromium.org,machenbach@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=

Review URL: https://codereview.chromium.org/1057873003

Cr-Commit-Position: refs/heads/master@{#27589}

R=svenpanne@chromium.org
BUG=

Review URL: https://codereview.chromium.org/1043363005

Cr-Commit-Position: refs/heads/master@{#27585}

BUG=v8:3996
LOG=y
R=dslomov@chromium.org,kbr@chromium.org,hpayer@chromium.org

Review URL: https://codereview.chromium.org/1041403003

Cr-Commit-Position: refs/heads/master@{#27580}

BUG=none
R=danno@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/960903003

Cr-Commit-Position: refs/heads/master@{#27579}

It triggers once per context that calls observe (or attempts to access
any observation metadata, e.g. through Object.getNotifier).

Review URL: https://codereview.chromium.org/1048213002

Cr-Commit-Position: refs/heads/master@{#27557}

Embedders should use IdleNotificationDeadline()

BUG=none
R=hpayer@chromium.org
LOG=y

Review URL: https://codereview.chromium.org/1019793008

Cr-Commit-Position: refs/heads/master@{#27550}

R=hpayer@chromium.org
BUG=

Review URL: https://codereview.chromium.org/1040763002

Cr-Commit-Position: refs/heads/master@{#27520}

also some drive-by handlescope fixes in api.cc

R=svenpanne@chromium.org

BUG=

Review URL: https://codereview.chromium.org/1040043002

Cr-Commit-Position: refs/heads/master@{#27510}

R=verwaest@chromium.org
BUG=468451
LOG=N

Review URL: https://codereview.chromium.org/1036743004

Cr-Commit-Position: refs/heads/master@{#27482}

R=jochen@chromium.org, erikcorry@chromium.org

BUG=

Review URL: https://codereview.chromium.org/998253006

Cr-Commit-Position: refs/heads/master@{#27475}

Before this patch the embedder could assign timestamp to the last interval after calling GetHeapStats. This would be slightly different from the timstamps assigned by v8 internally and written into heap snapshot. This patch allow to avoid this small discrepancy by returning timestamp along with last heap stats update.

BUG=chromium:467222
LOG=Y

Review URL: https://codereview.chromium.org/1037803002

Cr-Commit-Position: refs/heads/master@{#27466}

The method was deprecated a while ago: https://crrev.com/87e4bba31eabfd3b12e42b5886dc9da08d2daf13

LOG=Y
BUG=YES
API=Remove v8::Isolate::ClearInterrupt

Review URL: https://codereview.chromium.org/1032623007

Cr-Commit-Position: refs/heads/master@{#27449}

BUG=

Review URL: https://codereview.chromium.org/1003383004

Cr-Commit-Position: refs/heads/master@{#27442}

Revert of Track how many pages trigger fallback strategies in GC (patchset #2 id:20001 of https://codereview.chromium.org/1029323003/)

Reason for revert:
This seems to cause lots of crashes in layout tests debug:
../../third_party/WebKit/Source/bindings/core/v8/V8PerIsolateData.cpp(67) : void blink::useCounterCallback(v8::Isolate *, v8::Isolate::UseCounte

http://build.chromium.org/p/client.v8/builders/V8-Blink%20Linux%2064%20%28dbg%29/builds/2332

Original issue's description:
> Track how many pages trigger fallback strategies in GC
>
> R=hpayer@chromium.org
> BUG=
>
> Committed: https://crrev.com/bb880058f6499510cff12d98dc7d524d35d769cb
> Cr-Commit-Position: refs/heads/master@{#27421}

TBR=hpayer@chromium.org,erikcorry@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=

Review URL: https://codereview.chromium.org/1000523003

Cr-Commit-Position: refs/heads/master@{#27427}

R=hpayer@chromium.org
BUG=

Review URL: https://codereview.chromium.org/1029323003

Cr-Commit-Position: refs/heads/master@{#27421}

additionally, add a drive by fix to WeakCallbackInfo

R=jochen@chromium.org, erikcorry@chromium.org

BUG=

Review URL: https://codereview.chromium.org/1026283004

Cr-Commit-Position: refs/heads/master@{#27407}

All users should use IdleNotificationDeadline() instead

BUG=none
R=hpayer@chromium.org
LOG=y

Review URL: https://codereview.chromium.org/1028163003

Cr-Commit-Position: refs/heads/master@{#27386}

BUG=

Review URL: https://codereview.chromium.org/1009123003

Cr-Commit-Position: refs/heads/master@{#27371}

TBR=verwaest@chromium.org,ulan@chromium.org,ishell@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/1027463002

Cr-Commit-Position: refs/heads/master@{#27323}

Only adds a counter id, does not count anything.

R=jochen@chromium.org
BUG=v8:3942
LOG=N

Review URL: https://codereview.chromium.org/1020883002

Cr-Commit-Position: refs/heads/master@{#27313}

If the Maybe is nothing or the MaybeLocal is empty, it means that the
API call either threw an exception or an exception was already pending.

In that case, the embedder needs to handle the exception or otherwise
react to the failed API call.

BUG=v8:3929
R=svenpanne@chromium.org
LOG=y

Review URL: https://codereview.chromium.org/1022803002

Cr-Commit-Position: refs/heads/master@{#27298}

It's value is hardwired in gin[1] and is referenced in Blink[2]. Since it is treated specially by v8 debugger it should be defined in v8 API and referenced in gin and blink..

[1] https://src.chromium.org/viewvc/chrome/trunk/src/gin/public/context_holder.h?r1=239099&r2=239098&pathrev=239099
[2] https://code.google.com/p/chromium/codesearch#chromium/src/third_party/WebKit/Source/bindings/core/v8/V8PerContextData.cpp&q=kDebugIdIndex%20f:V8PerContextData&sq=package:chromium&type=cs

BUG=chromium:466631
LOG=Y

Review URL: https://codereview.chromium.org/1020453002

Cr-Commit-Position: refs/heads/master@{#27290}