v8::DontDelete is set for Unforgeable properties, so just not setting PROHIBITS_OVERWRITING should be enough.

The secondary "feature" of not allowing accessors to be installed in extending objects is incorrect and confusing, given that it only applies to accessors but not to regular properties:
Object.defineProperty({__proto__:window}, "location", { value: 10 })
works where
Object.defineProperty({__proto__:window}, "location", { get: function() {} })
doesn't work.

LOG=y
R=dcarney@chromium.org

Review URL: https://codereview.chromium.org/306203002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21596 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=
R=ishell@chromium.org

Review URL: https://codereview.chromium.org/309653003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21595 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

This reverts commit r21593 for breaking the Webkit tests.

TBR=mvstanton@chromium.org

Review URL: https://codereview.chromium.org/310593004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21594 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=ishell@chromium.org

Review URL: https://codereview.chromium.org/300423003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21593 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

TEST=mjsunit/array-shift,mjsunit/array-shift2,mjsunit/array-shift3
R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/308793010

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21592 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Use the zone that is passed to New() and fix implementation of
HPushArguments::AddInput() to match HPhi::AddInput().

R=jarin@chromium.org

Review URL: https://codereview.chromium.org/309763003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21591 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=yurys@chromium.org

Review URL: https://codereview.chromium.org/303693010

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21590 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=jarin@chromium.org

Review URL: https://codereview.chromium.org/308593003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21589 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=chromium:368114
LOG=y
R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/302063004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21586 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Inlined optimized runtime functions: expose Runtime versions for direct testing, skip Hydrogen versions

R=dslomov@chromium.org

Review URL: https://codereview.chromium.org/302703004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21585 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=chromium:377209
LOG=n
R=dslomov@chromium.org

Review URL: https://codereview.chromium.org/306543002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21584 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=v8:3359
LOG=y
R=ishell@chromium.org

Review URL: https://codereview.chromium.org/309483002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21583 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Additionally delete the unused Throw(BailoutReason)

BUG=
R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/308083006

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21582 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/305963002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21581 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Port r21578 (dcf13aa)

Original commit message:
- Move HType to it's own file.
- Add HType::HeapObject and some other useful types.
- Get rid of the broken and useless HType::NonPrimitive.
- Introduce HType::FromType() to convert from HeapType to HType.
- Also add unit tests for HType.
- Fix types in Crankshaft.

BUG=
R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/301023004

Patch from Balazs Kilvady <kilvadyb@homejinni.com>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21580 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

port r21578 (dcf13aa)

Original commit message:
- Move HType to it's own file.
- Add HType::HeapObject and some other useful types.
- Get rid of the broken and useless HType::NonPrimitive.
- Introduce HType::FromType() to convert from HeapType to HType.
- Also add unit tests for HType.
- Fix types in Crankshaft.

BUG=

Review URL: https://codereview.chromium.org/307903002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21579 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

- Move HType to it's own file.
- Add HType::HeapObject and some other useful types.
- Get rid of the broken and useless HType::NonPrimitive.
- Introduce HType::FromType() to convert from HeapType to HType.
- Also add unit tests for HType.
- Fix types in Crankshaft.

R=rossberg@chromium.org

Review URL: https://codereview.chromium.org/300893003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21578 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

The original patch which ensured that Object.observe did allocations in the correct context regressed performance about 12%. This patch gets back most of that (about 11%) by simply returning the correct function which is then directly callable from JS, rather than by making the call from the runtime function. A side-effect is that their implementation is shorter.

LOG=Y
BUG=NONE
R=verwaest@chromium.org

Review URL: https://codereview.chromium.org/307543008

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21575 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

If the embedder calls V8::TerminateExecution while we're running microtasks, bail out
and clear any pending microtasks.

All other exceptions are simply swallowed. No current Blink or V8 microtasks throw, this
just ensures something sane happens if another embedder decides to pass a throwing
microtask (or if ours unexpectedly throw due to, e.g., stack exhaustion).

BUG=371566
LOG=Y
R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/294943009

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21574 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

FastCloneShallowArrayStub should not be used it the length of the array is too big as it could eventually exceed the allowed size limit for manually folded allocations.

R=verwaest@chromium.org

Review URL: https://codereview.chromium.org/300283003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21573 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

TBR=verwaest@chromium.org
BUG=

Review URL: https://codereview.chromium.org/298253008

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21572 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=372579
LOG=N
R=verwaest@chromium.org

Review URL: https://codereview.chromium.org/306663002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21571 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

TEST=./tools/run_benchmarks.py benchmarks/v8.json
TEST=cd tools/unittests; python -m unittest run_benchmarks_test

Does not support custom results processors yet. Will implement that in a future CL.

BUG=374740
LOG=n
R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/293023006

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21570 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=machenbach@chromium.org

Review URL: https://codereview.chromium.org/300873006

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21569 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=
TBR=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/305643007

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21568 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=rossberg@chromium.org
LOG=N

Review URL: https://codereview.chromium.org/304533007

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21567 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

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

Review URL: https://codereview.chromium.org/300883003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21566 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

This broke the windows build.

R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/304633004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21565 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

This gives us much more room to customize on different functions, by
using MajorKey to differentiate them.

R=verwaest@chromium.org

Review URL: https://codereview.chromium.org/295383004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21564 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=hpayer@chromium.org
BUG=v8:2070
LOG=N

Review URL: https://codereview.chromium.org/300843009

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21563 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Turns out ASAN and valgrind notice if you leak 0 allocated bytes.

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

Review URL: https://codereview.chromium.org/306583006

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21562 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=jkummerow@chromium.org, machenbach@chromium.org

Review URL: https://codereview.chromium.org/307553003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21561 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=ulan@chromium.org

Review URL: https://codereview.chromium.org/301563004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21560 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=ulan@chromium.org

Review URL: https://codereview.chromium.org/300793002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21559 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

ExecutableAccessorInfo turns the property into a field. Better
to keep it as a callback, and correctly deal with the changed
property attributes.

R=ulan@chromium.org

Review URL: https://codereview.chromium.org/262053011

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21558 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=dcarney@chromium.org, jkummerow@chromium.org

Review URL: https://codereview.chromium.org/303543006

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21557 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/307543009

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21556 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=
R=ishell@chromium.org

Review URL: https://codereview.chromium.org/305513004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21555 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=hpayer@chromium.org
BUG=v8:2070
LOG=N

Review URL: https://codereview.chromium.org/303493005

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21554 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=hpayer@chromium.org

Review URL: https://codereview.chromium.org/307583002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21553 ce2b1a6d-e550-0410-aec6-3dcde31c8c00