Classes: Add super support in methods and accessors

This is done by installing the [[HomeObject]] on the method and the
accessor functions.

BUG=v8:3330
LOG=Y
R=dslomov@chromium.org

Review URL: https://codereview.chromium.org/683893002

Cr-Commit-Position: refs/heads/master@{#24976}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24976 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Revert "Various cleanup/simplification in object-observe.js"

It broke the context snapshot by trying to get ahold of the
per-isolate observation_state object too early.

This reverts commit a137cb74fb8f89fabcb0396bebb0bdf248c4b0ae.

TBR=yangguo@chromium.org

Review URL: https://codereview.chromium.org/692473002

Cr-Commit-Position: refs/heads/master@{#24977}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24977 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
[turbofan] cleanup register allocator interface a little

BUG=
R=jarin@chromium.org

Review URL: https://codereview.chromium.org/671043004

Cr-Commit-Position: refs/heads/master@{#24978}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24978 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
MIPS: Classes: Add super support in methods and accessors.

Port r24976 (5cb743f)

Original commit message:
This is done by installing the [[HomeObject]] on the method and the
accessor functions.

BUG=v8:3330
LOG=Y
R=dusan.milosavljevic@imgtec.com

Review URL: https://codereview.chromium.org/691503002

Cr-Commit-Position: refs/heads/master@{#24979}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24979 ce2b1a6d-e550-0410-aec6-3dcde31c8c00