X87: [runtime] Replace the EQUALS builtin with proper Object::Equals.

X87: [runtime] Replace the EQUALS builtin with proper Object::Equals.

port 54bab695f5de5bf5948c5b50b217628a00d60f91 (r30747).

original commit message:

    Move the implementation of the Abstract Equality Comparison to the
    runtime and thereby remove the EQUALS dispatcher builtin. Also remove
    the various runtime entry points that were only used to support the
    EQUALS builtin.

    Now the Abstract Equality Comparison is also using the correct
    ToPrimitive implementation, which properly supports @@toPrimitive.

BUG=

Committed: https://crrev.com/e97b1938ddb654646ed59e6628af58114d4619ce
Cr-Commit-Position: refs/heads/master@{#30780}

[chunyang.dai, 2015-09-16 09:01:09]

chunyang.dai@intel.com changed reviewers:
+ weiliang.lin@intel.com

[chunyang.dai, 2015-09-16 09:01:10]

ptal

[Weiliang, 2015-09-17 00:34:41]

The CQ bit was checked by weiliang.lin@intel.com

[Weiliang, 2015-09-17 00:34:41]

lgtm

[commit-bot: I haz the power, 2015-09-17 00:34:57]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1349623002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1349623002/1

[commit-bot: I haz the power, 2015-09-17 01:21:51]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-09-17 01:22:01]

Patchset 1 (id:??) landed as
https://crrev.com/e97b1938ddb654646ed59e6628af58114d4619ce
Cr-Commit-Position: refs/heads/master@{#30780}