The unscobables allow us to black list properties from showing up in
with statements.

https://people.mozilla.org/~jorendorff/es6-draft.html#sec-object-environment-records-hasbinding-n

The spec draft is not fully up to date.

https://github.com/rwaldron/tc39-notes/blob/master/es6/2014-07/jul-29.md#conclusionresolution

BUG=v8:3401
LOG=Y
R=rossberg@chromium.org, verwaest@chromium.org

Review URL: https://codereview.chromium.org/384963002

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

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22942 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Contributed by Mathias Bynens <mathiasb@opera.com>.

TEST=mjsunit/es6/string-html
BUG=v8:2218
LOG=Y
R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/422543003

Patch from Mathias Bynens <mathias@qiwi.be>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22938 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/448643002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22923 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=rossberg@chromium.org

Review URL: https://codereview.chromium.org/442283002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22922 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

This reverts r22918 and r22920.

TBR=hpayer@chromium.org

Review URL: https://codereview.chromium.org/448633002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22921 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=jochen@chromium.org, rtoy@chromium.org, svenpanne@chromium.org
BUG=v8:3006
LOG=N

Review URL: https://codereview.chromium.org/411263004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22918 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=rossberg@chromium.org, aandrey@chromium.org
BUG=393913
LOG=Y

Review URL: https://codereview.chromium.org/440773004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22913 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Also, add some bits missing from turn-on-symbols CL

R=adamk@chromium.org, dslomov@chromium.org
BUG=

Review URL: https://codereview.chromium.org/441943002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22910 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

In doing so also remove all references to the --harmony-collections flag.
Due to the way context snapshotting works, it's not possible to simply
enable the flag by default.

Depends on ES6 Symbols: https://codereview.chromium.org/421313004

BUG=v8:1622
LOG=Y
R=arv@chromium.org, rossberg@chromium.org

Review URL: https://codereview.chromium.org/427723002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22889 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=rossberg@chromium.org
BUG=v8:3422
LOG=N

Review URL: https://codereview.chromium.org/430693003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22872 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Skip gc-stress for test relying on stable feedback (and hence stable gc timing).

BUG=
R=hpayer@chromium.org

Review URL: https://codereview.chromium.org/441873005

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22852 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

When a debug event is triggered, the ExecutionState object should not
expose native JS code.

R=aandrey@chromium.org

Review URL: https://codereview.chromium.org/429453005

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22849 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

This also adds missing instrumentation and removes resolver tracking.

BUG=v8:3093
LOG=N
R=aandrey@chromium.org, yangguo@chromium.org

Review URL: https://codereview.chromium.org/416213004

Patch from Alexandra Mikhaylova <amikhaylova@google.com>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22846 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

This approach, of allowing either N or N+1 in this assert,
is the same approach used before my Symbols patch that naively
changed to use assertEquals.

TBR=dslomov@chromium.org

Review URL: https://codereview.chromium.org/439833002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22834 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

In doing so also remove all references to the --harmony-symbols flag.
Due to the way context snapshotting works, it's not possible to simply enable
the flag by default.

BUG=v8:2158
LOG=Y
R=dslomov@chromium.org

Review URL: https://codereview.chromium.org/421313004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22831 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Ensure prototypes always stay fast by turning them fast again after an operation that turned them slow

BUG=
R=ishell@chromium.org

Review URL: https://codereview.chromium.org/439243005

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22827 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=
R=ishell@chromium.org

Review URL: https://codereview.chromium.org/437083004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22826 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

TBR=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/436223003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22814 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/440673002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22807 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=titzer@chromium.org
TEST=all

Review URL: https://codereview.chromium.org/416233003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22793 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=danno@google.com, danno@chromium.org

Review URL: https://codereview.chromium.org/425263002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22711 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/426233002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22709 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

TEST=
BUG=
R=jkummerow@chromium.org, paul.lind@imgtec.com

Review URL: https://codereview.chromium.org/426863006

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22681 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=titzer@chromium.org
TEST=mjsunit/regress/regress-3476
BUG=v8:3476
LOG=N

Review URL: https://codereview.chromium.org/423083004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22677 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Keep the descriptor properly intact while update the field type.

BUG=v8:3458
LOG=y
R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/424093002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22671 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

TBR=ishell@chromium.org

Review URL: https://codereview.chromium.org/429583002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22670 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

The CallIC Array custom IC stub read from the type vector, expecting
to get an AllocationSite. But there are paths in the system where a
type vector can be re-created with default values, even though we
currently grant an exception to clearing of vector slots with
AllocationSites in them at gc time.

BUG=392114
LOG=N
R=verwaest@chromium.org

Review URL: https://codereview.chromium.org/418023002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22668 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=jacob.bramley@arm.com, titzer@chromium.org, rossberg@chromium.org

Review URL: https://codereview.chromium.org/410153002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22666 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=svenpanne@chromium.org
BUG=v8:3469
LOG=N

Review URL: https://codereview.chromium.org/425943002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22665 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=
R=ishell@chromium.org

Review URL: https://codereview.chromium.org/424043006

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22660 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=
R=ishell@chromium.org

Review URL: https://codereview.chromium.org/428463005

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22659 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

TBR=danno@chromium.org

Review URL: https://codereview.chromium.org/426683002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22653 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

TBR=danno@chromium.org

Review URL: https://codereview.chromium.org/428593002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22648 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Also explicit length setting with a.length = N should remain in fast mode.

R=verwaest@chromium.org

Review URL: https://codereview.chromium.org/416403002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22645 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

In GrowMode, force the value to the right representation to avoid deopts between storing the length and storing the value.

BUG=16459193
LOG=n
R=danno@chromium.org

Review URL: https://codereview.chromium.org/419683004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22616 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

BUG=3462
LOG=Y
R=verwaest@chromium.org

Review URL: https://codereview.chromium.org/417793002

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

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22606 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

The latest ES6 draft changed the behavior of for-of on null / undefined,
which for once is a simplification.

R=rossberg@chromium.org
BUG=

Review URL: https://codereview.chromium.org/416033002

Patch from Andy Wingo <wingo@igalia.com>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22602 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Due to failures in mjsunit/array-functions-prototype-misc

TBR=verwaest@chromium.org

Review URL: https://codereview.chromium.org/417953004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22601 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

R=ishell@chromium.org

Review URL: https://codereview.chromium.org/416003004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22599 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

Also explicit length setting with a.length = N should remain in fast mode.

R=verwaest@chromium.org

Review URL: https://codereview.chromium.org/397593008

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22595 ce2b1a6d-e550-0410-aec6-3dcde31c8c00