This API closely matches the Worker API. The differences:

1) The argument to the Worker constructor is a function to run, not a script.
2) Receiving a message from a worker is a synchronous API (as there is no event
loop).

The serialization done here is not robust as the real DOM implementation. For
example, recursive data structures or otherwise duplicated objects are not
allowed.

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

Review URL: https://codereview.chromium.org/1185643004

Cr-Commit-Position: refs/heads/master@{#29126}

Reason for revert:
[Sheriff] Breaks layout tests. Please submit a needsmanualrebaseline change on the blink side for the expectations if intended.

E.g.
http://build.chromium.org/p/client.v8.fyi/builders/V8-Blink%20Linux%2064/builds/545

Original issue's description:
> Ship arrow functions
>
> R=rossberg@chromium.org
> LOG=Y
> BUG=v8:2700
>
> Committed: https://crrev.com/541b6c39e0ecae1c070f51fae8e9e3dab18d278c
> Cr-Commit-Position: refs/heads/master@{#29119}

TBR=rossberg@chromium.org,wingo@igalia.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:2700

Review URL: https://codereview.chromium.org/1182053013

Cr-Commit-Position: refs/heads/master@{#29125}

Revert of [es6] ship Object.assign (patchset #2 id:20001 of https://codereview.chromium.org/1191003003/)

Reason for revert:
Seems to break asan somehow

Original issue's description:
> [es6] ship Object.assign
>
> BUG=v8:4007
> LOG=N
> R=rossberg@chromium.org, arv@chromium.org
> CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_chromium_rel_ng;tryserver.blink:linux_blink_rel
>
> Committed: https://crrev.com/12e194860a56d47a10d89ae34761a4af6b6166bb
> Cr-Commit-Position: refs/heads/master@{#29118}

TBR=arv@chromium.org,dslomov@chromium.org,rossberg@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:4007

Review URL: https://codereview.chromium.org/1191593005

Cr-Commit-Position: refs/heads/master@{#29124}

Revert of Re-land new insertion write barrier. (patchset #3 id:40001 of https://codereview.chromium.org/1153233003/)

Reason for revert:
Deoptimizer crashes.

Original issue's description:
> Re-land new insertion write barrier.
>
> BUG=
>
> Committed: https://crrev.com/72f850458cb530d871cf3fb6442660555dc51bc2
> Cr-Commit-Position: refs/heads/master@{#29052}

TBR=ulan@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=

Review URL: https://codereview.chromium.org/1176243015

Cr-Commit-Position: refs/heads/master@{#29123}

Revert of Revert of [strong] Implement strong mode restrictions on property access (patchset #1 id:1 of https://codereview.chromium.org/1189153002/)

Reason for revert:
Issue was ultimately caused/fixed by https://codereview.chromium.org/1194673002/

Original issue's description:
> Revert of [strong] Implement strong mode restrictions on property access (patchset #23 id:460001 of https://codereview.chromium.org/1168093002/)
>
> Reason for revert:
> Speculative revert, maybe breaks GC-stress
>
> http://build.chromium.org/p/client.v8/builders/V8%20Linux64%20GC%20Stress%20-%20custom%20snapshot/builds/808
>
> Original issue's description:
> > [strong] Implement strong mode restrictions on property access
> >
> > Implements the strong mode proposal's restrictions on property access.
> >
> > To be fully explored in a followup: proxies, interceptors, access checks, load from super
> >
> > BUG=v8:3956
> > LOG=N
> >
> > Committed: https://crrev.com/85dbfb9a389e7b21bd2a63862202ee97fc5d7982
> > Cr-Commit-Position: refs/heads/master@{#29109}
>
> TBR=rossberg@chromium.org,mvstanton@chromium.org,mstarzinger@chromium.org,verwaest@chromium.org
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=v8:3956
>
> Committed: https://crrev.com/407657b706711fd5f8d417841e24b284886f3776
> Cr-Commit-Position: refs/heads/master@{#29115}

TBR=rossberg@chromium.org,mvstanton@chromium.org,mstarzinger@chromium.org,verwaest@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:3956
LOG=N

Review URL: https://codereview.chromium.org/1185343005

Cr-Commit-Position: refs/heads/master@{#29122}

Revert of Replace ad-hoc weakness in transition array with WeakCell. (patchset #5 id:80001 of https://codereview.chromium.org/1157943003/)

Reason for revert:
Breaks descriptor array clearing.

Original issue's description:
> Replace ad-hoc weakness in transition array with WeakCell.
>
> BUG=
>
> Committed: https://crrev.com/885455e99de817f86a0b5df2dc0d932cfc179749
> Cr-Commit-Position: refs/heads/master@{#29083}

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

Review URL: https://codereview.chromium.org/1194673002

Cr-Commit-Position: refs/heads/master@{#29121}

RegExpExecStub pushes callee-saved registers without setting up a frame. This confuses the stack iterator.

Other architectures do not save these registers.

BUG=chromium:487981
LOG=NO
TEST=mjsunit/regress/regress-487981

Review URL: https://codereview.chromium.org/1183593005

Cr-Commit-Position: refs/heads/master@{#29120}

R=rossberg@chromium.org
LOG=Y
BUG=v8:2700

Review URL: https://codereview.chromium.org/1187173004

Cr-Commit-Position: refs/heads/master@{#29119}

BUG=v8:4007
LOG=N
R=rossberg@chromium.org, arv@chromium.org
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_chromium_rel_ng;tryserver.blink:linux_blink_rel

Review URL: https://codereview.chromium.org/1191003003

Cr-Commit-Position: refs/heads/master@{#29118}

R=machenbach@chromium.org

Review URL: https://codereview.chromium.org/1189943005

Cr-Commit-Position: refs/heads/master@{#29117}

BUG=v8:4137
LOG=n

Review URL: https://codereview.chromium.org/1191813003

Cr-Commit-Position: refs/heads/master@{#29116}

Revert of [strong] Implement strong mode restrictions on property access (patchset #23 id:460001 of https://codereview.chromium.org/1168093002/)

Reason for revert:
Speculative revert, maybe breaks GC-stress

http://build.chromium.org/p/client.v8/builders/V8%20Linux64%20GC%20Stress%20-%20custom%20snapshot/builds/808

Original issue's description:
> [strong] Implement strong mode restrictions on property access
>
> Implements the strong mode proposal's restrictions on property access.
>
> To be fully explored in a followup: proxies, interceptors, access checks, load from super
>
> BUG=v8:3956
> LOG=N
>
> Committed: https://crrev.com/85dbfb9a389e7b21bd2a63862202ee97fc5d7982
> Cr-Commit-Position: refs/heads/master@{#29109}

TBR=rossberg@chromium.org,mvstanton@chromium.org,mstarzinger@chromium.org,verwaest@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:3956

Review URL: https://codereview.chromium.org/1189153002

Cr-Commit-Position: refs/heads/master@{#29115}

BUG=v8:4137
LOG=n

Review URL: https://codereview.chromium.org/1190143002

Cr-Commit-Position: refs/heads/master@{#29114}

BUG=v8:4137
LOG=n

Review URL: https://codereview.chromium.org/1188073003

Cr-Commit-Position: refs/heads/master@{#29113}

BUG=chromium:493043
LOG=n
NOTRY=true

Review URL: https://codereview.chromium.org/1196453002

Cr-Commit-Position: refs/heads/master@{#29112}

This is a first step towards disentangling the backend code. In the future we should just use ElementsAccessors.
BUG=v8:4137
LOG=n

Review URL: https://codereview.chromium.org/1177043012

Cr-Commit-Position: refs/heads/master@{#29111}

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

Review URL: https://codereview.chromium.org/1179413006

Cr-Commit-Position: refs/heads/master@{#29110}

Implements the strong mode proposal's restrictions on property access.

To be fully explored in a followup: proxies, interceptors, access checks, load from super

BUG=v8:3956
LOG=N

Review URL: https://codereview.chromium.org/1168093002

Cr-Commit-Position: refs/heads/master@{#29109}

Currently, the desugaring of for loops of the form for
(let/const ...; bla; bla) causes them to always have a
completion value of 1, regardless of whether the loop body
is executed or not. This CL fixes this, realigning
initializer blocks as a more general purpose way to avoid
the completion value rewriter (since that's all they really
do anyway).

BUG=

Review URL: https://codereview.chromium.org/1177053006

Cr-Commit-Position: refs/heads/master@{#29108}

Reland [turbofan] Disable select matching due to bug manifesting on arm. (patchset #2 id:40001 of https://codereview.chromium.org/1176403005/)

Reason for revert:
This causes timeouts in Massive on chromebooks.

Original issue's description:
> Revert of [turbofan] Disable select matching due to bug manifesting on arm. (patchset #1 id:1 of https://codereview.chromium.org/1077613002/)
>
> Reason for revert:
> [Sheriff] Checking if this still fails and if yes persists info about failures.
>
> Original issue's description:
> > [turbofan] Disable select matching due to bug manifesting on arm.
> >
> > R=machenbach@chromium.org
> > BUG=
> >
> > Committed: https://crrev.com/6e5d805718195c4b5ac64cd540379cecf10b8f5c
> > Cr-Commit-Position: refs/heads/master@{#27702}
>
> TBR=bmeurer@chromium.org
>
> Committed: https://crrev.com/7c36a7d91d8706b29df07013085fbe3c8e93b0ed
> Cr-Commit-Position: refs/heads/master@{#29103}

TBR=titzer@chromium.org,bmeurer@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/1195563003

Cr-Commit-Position: refs/heads/master@{#29107}

Dampen the old generation allocation limit only after the initial old generation size was configured.

Otherwise, dampening interferes with initial size configuration and causes GC too early.

BUG=501703
LOG=NO

Review URL: https://codereview.chromium.org/1183633005

Cr-Commit-Position: refs/heads/master@{#29106}

This turns the CommonOperatorReducer into an AdvancedReducer and makes
it independent of JSGraph (which was used only because it was convienent),
and let's the CommonOperatorReducer run together with the ControlReducer.

The ControlReducer is still not able to run together with other reducers,
but we're getting closer. The plan is to split the ControlReducer into
two parts: The dead code elimination part and the common operator
reduction part. This separation will help to avoid tricky bugs in the
future and should make testing a *lot* easier.

R=jarin@chromium.org

Review URL: https://codereview.chromium.org/1192063002

Cr-Commit-Position: refs/heads/master@{#29105}

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/1186033006

Cr-Commit-Position: refs/heads/master@{#29104}

Revert of [turbofan] Disable select matching due to bug manifesting on arm. (patchset #1 id:1 of https://codereview.chromium.org/1077613002/)

Reason for revert:
[Sheriff] Checking if this still fails and if yes persists info about failures.

Original issue's description:
> [turbofan] Disable select matching due to bug manifesting on arm.
>
> R=machenbach@chromium.org
> BUG=
>
> Committed: https://crrev.com/6e5d805718195c4b5ac64cd540379cecf10b8f5c
> Cr-Commit-Position: refs/heads/master@{#27702}

TBR=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/1176403005

Cr-Commit-Position: refs/heads/master@{#29103}

We never hit the phi case for DecideCondition in practice, since a more
general optimization is already performed by typing and constant
propagation.

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

Review URL: https://codereview.chromium.org/1186973005

Cr-Commit-Position: refs/heads/master@{#29102}

BUG=chromium:498689
LOG=n
NOTRY=true
TBR=sergiyb@chromium.org

Review URL: https://codereview.chromium.org/1185623003

Cr-Commit-Position: refs/heads/master@{#29101}

On MIPS32 we can't read a 8 bytes long data from a not 8 bytes aligned memory address.

BUG=
TEST=mjsunit/debug-backtrace

Review URL: https://codereview.chromium.org/1193433002

Cr-Commit-Position: refs/heads/master@{#29100}

Reason for revert:
[Sheriff] gyp still contains an offending patch

Original issue's description:
> Update V8 DEPS.
>
> Rolling v8/build/gyp to fdcd8bc10c935eff13b391644b01460593c46861
>
> Rolling v8/tools/clang to d2b4eddd701ff0265124147bcb0a65f32273f06b
>
> TBR=machenbach@chromium.org
>
> Committed: https://crrev.com/a940eb8a7cba6596ea25819c0112c3ca053074ed
> Cr-Commit-Position: refs/heads/master@{#29097}

TBR=v8-autoroll@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/1185453011

Cr-Commit-Position: refs/heads/master@{#29099}

R=bmeurer@chromium.org
TEST=cctest/test-pipeline

Review URL: https://codereview.chromium.org/1193543002

Cr-Commit-Position: refs/heads/master@{#29098}

Rolling v8/build/gyp to fdcd8bc10c935eff13b391644b01460593c46861

Rolling v8/tools/clang to d2b4eddd701ff0265124147bcb0a65f32273f06b

TBR=machenbach@chromium.org

Review URL: https://codereview.chromium.org/1192033002

Cr-Commit-Position: refs/heads/master@{#29097}

Currently this verifier will post an informative error if the author has not signed CLA, instead of rejecting the CL.

LOG=N

BUG=457428

Review URL: https://codereview.chromium.org/1185193009

Cr-Commit-Position: refs/heads/master@{#29096}

Restores SortNumbers perf degrade

BUG=chromium:495949, v8:4137
LOG=n

Review URL: https://codereview.chromium.org/1177043009

Cr-Commit-Position: refs/heads/master@{#29095}

Use it in detection of low young generation allocation rate.

BUG=501314
LOG=NO
TBR=hpayer@chromium.org

Review URL: https://codereview.chromium.org/1186903005

Cr-Commit-Position: refs/heads/master@{#29094}

R=adamk@chromium.org

Review URL: https://codereview.chromium.org/1185313002

Cr-Commit-Position: refs/heads/master@{#29093}

R=jochen@chromium.org,jarin@chromium.org
TEST=cctest

Review URL: https://codereview.chromium.org/1176423007

Cr-Commit-Position: refs/heads/master@{#29092}

R=machenbach@chromium.org
NOTRY=y

Review URL: https://codereview.chromium.org/1175123003

Cr-Commit-Position: refs/heads/master@{#29091}

Otherwise we'd have to probe for pending exceptions.

I'll do the same to other interceptors in follow-up CLs

BUG=chromium:495949,v8:4137
LOG=n

Review URL: https://codereview.chromium.org/1190023002

Cr-Commit-Position: refs/heads/master@{#29090}

The condition of a Branch or Select can never be a NumberConstant,
because the resulting graph would be invalid, so we don't need to
optimize this case. It can only ever be a tagged boolean or an untagged
bit.

Drive-by-fix: Test the interesting cases in the unit tests instead.

R=jarin@chromium.org

Review URL: https://codereview.chromium.org/1195443004

Cr-Commit-Position: refs/heads/master@{#29089}

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/1187263003

Cr-Commit-Position: refs/heads/master@{#29088}

BUG=
TBR=hpayer@chromium.org

Review URL: https://codereview.chromium.org/1188093003

Cr-Commit-Position: refs/heads/master@{#29087}