ES6 computed property names

ES6 computed property names

This adds support for computed property names, under the flag
--harmony-computed-property-names, for both object literals and
classes.

This is a revert of the revert, a76419f0f497db156eb1010e9b4be398951280cb with
no changes. I cannot reproduce the issue on Win8.1 or WinXP. Letting the bots
try again.

BUG=v8:3754
LOG=Y
TBR=dslomov@chromium.org

Committed: https://crrev.com/a235b1076ae4b79baae1d17a5079cb6cfc462ba3
Cr-Commit-Position: refs/heads/master@{#25851}

[arv (Not doing code reviews), 2014-12-16 17:01:13]

The CQ bit was checked by arv@chromium.org

[commit-bot: I haz the power, 2014-12-16 17:02:20]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/807173002/1

[commit-bot: I haz the power, 2014-12-16 17:29:54]

Committed patchset #1 (id:1)

[arv (Not doing code reviews), 2014-12-16 19:37:44]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.chromium.org/807033003/ by arv@chromium.org.

The reason for reverting is: Crashes Win32. It was not flake..

[adamk, 2014-12-16 19:57:48]

adamk@chromium.org changed reviewers:
+ adamk@chromium.org

[adamk, 2014-12-16 19:57:49]

Only thing wrong I see

https://codereview.chromium.org/807173002/diff/1/src/ia32/full-codegen-ia32.cc
File src/ia32/full-codegen-ia32.cc (right):

https://codereview.chromium.org/807173002/diff/1/src/ia32/full-codegen-ia32.c...
src/ia32/full-codegen-ia32.cc:1746: __ Drop(3);
Should this be Drop(4)? I see the same difference between the call and drop in
every other arch, but maybe it's only causing a problem on Windows?

[arv (Not doing code reviews), 2014-12-16 20:09:37]

https://codereview.chromium.org/807173002/diff/1/src/ia32/full-codegen-ia32.cc
File src/ia32/full-codegen-ia32.cc (right):

https://codereview.chromium.org/807173002/diff/1/src/ia32/full-codegen-ia32.c...
src/ia32/full-codegen-ia32.cc:1746: __ Drop(3);
On 2014/12/16 19:57:48, adamk wrote:
> Should this be Drop(4)? I see the same difference between the call and drop in
> every other arch, but maybe it's only causing a problem on Windows?

There is an extra push in the if branch above.

[commit-bot: I haz the power, 2014-12-17 10:14:33]

Patchset 1 (id:??) landed as
https://crrev.com/a235b1076ae4b79baae1d17a5079cb6cfc462ba3
Cr-Commit-Position: refs/heads/master@{#25851}