[builtins] Migrate ArrayBufferPrototypeByteLength to C++.

[builtins] Migrate ArrayBufferPrototypeByteLength to C++.

Working on eliminating the use of ClassOf(). This function was checking IS_ARRAYBUFFER.

BUG=

Committed: https://crrev.com/efcd385ddf4046423d5c8c2b8b8b6e33869c946f
Cr-Commit-Position: refs/heads/master@{#37565}

[Franzi, 2016-07-06 09:44:07]

Description was changed from

==========
Migrate ArrayBufferPrototypeByteLength to C++.

Eliminate use of ClassOf().

BUG=
==========

to

==========
[builtins] Migrate ArrayBufferPrototypeByteLength to C++.

Working on eliminating the use of ClassOf(). This function was checking
IS_ARRAYBUFFER.


BUG=
==========

[Franzi, 2016-07-06 09:44:46]

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

[Franzi, 2016-07-06 11:25:07]

Hi Benedikt, 

I got started with remove ClassOf() usages. Here's
ArrayBuffer.prototype.byteLength as a builtin function

I didn't delete the runtime function since we still use it and I didn't want
performance to go down. I'll remove it once I migrated all uses of
%_ArrayBufferGetByteLength. 

Please take a look. Thanks, 

Franzi

[Benedikt Meurer, 2016-07-06 17:49:11]

LGTM, thanks.

[Franzi, 2016-07-06 18:54:41]

The CQ bit was checked by franzih@chromium.org

[commit-bot: I haz the power, 2016-07-06 18:54:50]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-07-06 19:23:53]

Description was changed from

==========
[builtins] Migrate ArrayBufferPrototypeByteLength to C++.

Working on eliminating the use of ClassOf(). This function was checking
IS_ARRAYBUFFER.


BUG=
==========

to

==========
[builtins] Migrate ArrayBufferPrototypeByteLength to C++.

Working on eliminating the use of ClassOf(). This function was checking
IS_ARRAYBUFFER.


BUG=
==========

[commit-bot: I haz the power, 2016-07-06 19:23:57]

Committed patchset #4 (id:60001)

[commit-bot: I haz the power, 2016-07-06 19:25:39]

Description was changed from

==========
[builtins] Migrate ArrayBufferPrototypeByteLength to C++.

Working on eliminating the use of ClassOf(). This function was checking
IS_ARRAYBUFFER.


BUG=
==========

to

==========
[builtins] Migrate ArrayBufferPrototypeByteLength to C++.

Working on eliminating the use of ClassOf(). This function was checking
IS_ARRAYBUFFER.

BUG=

Committed: https://crrev.com/efcd385ddf4046423d5c8c2b8b8b6e33869c946f
Cr-Commit-Position: refs/heads/master@{#37565}
==========

[commit-bot: I haz the power, 2016-07-06 19:25:40]

Patchset 4 (id:??) landed as
https://crrev.com/efcd385ddf4046423d5c8c2b8b8b6e33869c946f
Cr-Commit-Position: refs/heads/master@{#37565}