[api] Introduce ReturnValue::Get

[api] Introduce ReturnValue::Get

This is a convenience API that an embedder can use to do final checks on
the return value. Note that this creates a new handle and thus defeats
the performance optimization done for ReturnValue - an embedder should
only use this in non-performance critical code paths.

BUG=
R=verwaest@chromium.org

Committed: https://crrev.com/b3d793e48ab513b964d3e21be81f6b6713854ab2
Cr-Commit-Position: refs/heads/master@{#35409}

[Toon Verwaest, 2016-04-12 08:29:23]

lgtm

[jochen (gone - plz use gerrit), 2016-04-12 09:30:02]

The CQ bit was checked by jochen@chromium.org

[commit-bot: I haz the power, 2016-04-12 09:30:06]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1875263003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1875263003/1

[commit-bot: I haz the power, 2016-04-12 09:33:19]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-04-12 09:34:19]

Description was changed from

==========
[api] Introduce ReturnValue::Get

This is a convenience API that an embedder can use to do final checks on
the return value. Note that this creates a new handle and thus defeats
the performance optimization done for ReturnValue - an embedder should
only use this in non-performance critical code paths.

BUG=
R=verwaest@chromium.org
==========

to

==========
[api] Introduce ReturnValue::Get

This is a convenience API that an embedder can use to do final checks on
the return value. Note that this creates a new handle and thus defeats
the performance optimization done for ReturnValue - an embedder should
only use this in non-performance critical code paths.

BUG=
R=verwaest@chromium.org

Committed: https://crrev.com/b3d793e48ab513b964d3e21be81f6b6713854ab2
Cr-Commit-Position: refs/heads/master@{#35409}
==========

[commit-bot: I haz the power, 2016-04-12 09:34:20]

Patchset 1 (id:??) landed as
https://crrev.com/b3d793e48ab513b964d3e21be81f6b6713854ab2
Cr-Commit-Position: refs/heads/master@{#35409}