If an developer attempts to "subclass" Error by running
`MyError.prototype = new Error();`, then the internal v8::Message object
that's produced and handed off to `window.onerror` handlers is poorly
stringified as "[object Object]".

This patch adjusts the stringification process for these objects to
include not only native Error objects, but also objects that have Error
in their prototype chain, and haven't overwritten Error.toString with
some custom variant.

BUG=2822
R=mstarzinger@chromium.org, yangguo@chromium.org

Review URL: https://codereview.chromium.org/21761002

Patch from Mike West <mkwst@chromium.org>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16075 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

https://codereview.chromium.org/19541010/

The main problem is that if you called Object.getNotifier(obj) on an object, %SetObserved(object) would never get called on it, and thus it would be unobservable (new test added for this).

Additionally, Runtime::SetObserved was asserting obj->IsJSObject() which would fail if called on a proxy.

It just happens that our existing test always called getNotifier() before Object.observe on proxies, and thus we never previously attempted to transition the map of a proxy.

Both issues are now fixed and properly tested.

R=rossberg@chromium.org

Review URL: https://codereview.chromium.org/21891008

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16074 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

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

Review URL: https://codereview.chromium.org/22184004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16073 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

At the last face-to-face meeting it was decided that we should use
numeric indexes for the Array Iterator values.

https://github.com/rwldrn/tc39-notes/blob/master/es6/2013-07/july-24.md#514-keys-entries-return-numbers-for-array-index-properties

BUG=v8:2818
R=dslomov@chromium.org

Review URL: https://codereview.chromium.org/21180008

Patch from Erik Arvidsson <arv@chromium.org>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16072 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

This re-lands r15776 and r15777, reverting the revert in r15786.

R=rossberg@chromium.org

Review URL: https://codereview.chromium.org/22144006

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16071 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

to a check for __SOFTP. Most other programs look for __SOFTFP__ [1], so
look for both to increase the chances of not erroring out when using GCC 4.5.

[1] Based on http://codesearch.debian.net/search?q=__SOFTFP__ vs
    http://codesearch.debian.net/search?q=__SOFTFP[^_]

BUG=v8:2140
R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/22210002

Patch from Raphael Kubo da Costa <raphael.kubo.da.costa@intel.com>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16070 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=None
R=alph@chromium.org, yangguo@chromium.org

Review URL: https://codereview.chromium.org/22300005

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16069 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Thanks to Akos Palfi for finding the bug.

BUG=
R=ulan@chromium.org

Review URL: https://chromiumcodereview.appspot.com/22388002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16068 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

The start and end time are now measured in microseconds and the type is int64_t.
This way it seems more natural as we are going to support submilisecond sampling
rate soon. Also it fixes cctest/test-cpu-profiler/ProfileStartEndTime test
failure caused by comparison between long double and double.

TEST=cctest/test-cpu-profiler/ProfileStartEndTime
BUG=v8:2824
R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/22155003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16067 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/22277006

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16064 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

TBR=mstarzinger@chromium.org
BUG=

Review URL: https://codereview.chromium.org/22371002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16063 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Port r16057 (b73ae514)

Original commit message:
Currently only direct map checks are supported. Otherwise only polymorphic cases with a generic fallback behave properly, regular polymorphic cases still need to be adapted.

BUG=

Review URL: https://codereview.chromium.org/22254007

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16062 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=danno@chromium.org

Review URL: https://codereview.chromium.org/21721002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16061 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Port r16055 (7567e57f)

BUG=

Review URL: https://codereview.chromium.org/21639003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16060 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=
R=ulan@chromium.org

Review URL: https://chromiumcodereview.appspot.com/22226002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16059 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

This makes sure that the first hit is used when dumping heap constants
and hence "TheHoleValue" is not overwritten with other roots that are
initialized to the hole as well.

R=verwaest@chromium.org

Review URL: https://codereview.chromium.org/21639004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16058 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Currently only direct map checks are supported. Otherwise only polymorphic cases with a generic fallback behave properly, regular polymorphic cases still need to be adapted.

R=danno@chromium.org

Review URL: https://chromiumcodereview.appspot.com/21536003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16057 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=machenbach@chromium.org

Review URL: https://codereview.chromium.org/21645003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16056 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=danno@chromium.org

Review URL: https://chromiumcodereview.appspot.com/21065006

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16055 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=
R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/20867003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16052 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=danno@chromium.org

Review URL: https://codereview.chromium.org/22041003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16051 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

This reverts r16049 for breaking build on windows.

TBR=svenpanne@chromium.org,machenbach@chromium.org

Review URL: https://codereview.chromium.org/22189002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16050 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

The start and end time are now measured in microseconds and the type is int64_t. This way it seems more natural as we are going to support submilisecond sampling rate soon. Also it fixes cctest/test-cpu-profiler/ProfileStartEndTime test failure caused by comparison between long double and double.

TEST=cctest/test-cpu-profiler/ProfileStartEndTime
BUG=v8:2824
R=alph@chromium.org, bmeurer@chromium.org

Review URL: https://codereview.chromium.org/22172002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16049 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=v8:2821
TEST=cctest/test-api/JSONParse
R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/21959003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16048 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

TBR=mstarzinger@chromium.org
BUG=

Review URL: https://codereview.chromium.org/22169002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16047 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=mstarzinger@chromium.org
BUG=

Review URL: https://codereview.chromium.org/21133006

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16045 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/22164003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16044 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=
R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/22164002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16043 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=bmeurer@chromium.org
BUG=

Review URL: https://codereview.chromium.org/21830004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16042 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=danno@chromium.org

Review URL: https://chromiumcodereview.appspot.com/21813004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16041 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=mstarzinger@chromium.org
BUG=

Review URL: https://codereview.chromium.org/21042004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16040 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

I'm going to change CPU profiler API and deprecate GetSelfTime, GetTotalTime and GetTotalSamplesCount on CpuProfileNode as all of those values are derived from self samples count and sampling rate. The sampling rate in turn is calculate based on the profiling duration so having start/end time and total sample count is enough for calculating smpling rate.

BUG=267595
R=alph@chromium.org, bmeurer@chromium.org

Review URL: https://codereview.chromium.org/21918002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16039 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/22146002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16038 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=svenpanne@chromium.org
BUG=

Review URL: https://codereview.chromium.org/21466003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16037 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/22089002

Patch from Weiliang Lin <weiliang.lin2@gmail.com>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16036 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Port r16021 (d79f4450)

BUG=

Review URL: https://codereview.chromium.org/21903003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16035 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=danno@chromium.org

Review URL: https://codereview.chromium.org/21477002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16034 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

The previous implementation of Free is a deprecated overload now.

R=mstarzinger@chromium.org

Committed: https://code.google.com/p/v8/source/detail?r=16031

Review URL: https://codereview.chromium.org/21803002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16033 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

This reverts r16031 for breaking shared build.

TBR=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/21818003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16032 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

The previous implementation of Free is a deprecated overload now.

R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/21803002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16031 ce2b1a6d-e550-0410-aec6-3dcde31c8c00