[stubs] Introduce ToNameStub to implement %_ToName.

[stubs] Introduce ToNameStub to implement %_ToName.

We already had hand-written optimized code for %_ToName in fullcodegen,
but the optimizing compilers always went to the runtime for %_ToName,
which is pretty bad for many of our builtins. So this CL moves the
existing native code to a ToNameStub (similar to the existing
ToStringStub), and uses the ToNameStub consistently in all compilers to
actually implement %_ToName.

Committed: https://crrev.com/a0878333de4dd090f9d8987e1698a9eef9cc7219
Cr-Commit-Position: refs/heads/master@{#33460}

[Benedikt Meurer, 2016-01-22 09:17:51]

bmeurer@chromium.org changed reviewers:
+ jarin@chromium.org

[Benedikt Meurer, 2016-01-22 09:17:52]

Hey Jaro,

Here's the %_ToName stuff, removing the runtime call overhead in the common case
as discussed offline.
Please take a look.

Thanks,
Benedikt

[Jarin, 2016-01-22 09:22:54]

lgtm

[Benedikt Meurer, 2016-01-22 09:35:21]

The CQ bit was checked by bmeurer@chromium.org

[commit-bot: I haz the power, 2016-01-22 09:35:27]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1622493002/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1622493002/20001

[commit-bot: I haz the power, 2016-01-22 09:52:20]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-01-22 09:52:45]

Description was changed from

==========
[stubs] Introduce ToNameStub to implement %_ToName.

We already had hand-written optimized code for %_ToName in fullcodegen,
but the optimizing compilers always went to the runtime for %_ToName,
which is pretty bad for many of our builtins. So this CL moves the
existing native code to a ToNameStub (similar to the existing
ToStringStub), and uses the ToNameStub consistently in all compilers to
actually implement %_ToName.
==========

to

==========
[stubs] Introduce ToNameStub to implement %_ToName.

We already had hand-written optimized code for %_ToName in fullcodegen,
but the optimizing compilers always went to the runtime for %_ToName,
which is pretty bad for many of our builtins. So this CL moves the
existing native code to a ToNameStub (similar to the existing
ToStringStub), and uses the ToNameStub consistently in all compilers to
actually implement %_ToName.

Committed: https://crrev.com/a0878333de4dd090f9d8987e1698a9eef9cc7219
Cr-Commit-Position: refs/heads/master@{#33460}
==========

[commit-bot: I haz the power, 2016-01-22 09:52:46]

Patchset 2 (id:??) landed as
https://crrev.com/a0878333de4dd090f9d8987e1698a9eef9cc7219
Cr-Commit-Position: refs/heads/master@{#33460}