[DevTools] Speculative chrome os tests fix

[DevTools] Speculative chrome os tests fix

After analysis every return point of V8RuntimAgentImpl::evaluate only one suspicious return was found in InjectedScript::wrapValue.
If function.call returns empty value without exception then we return empty MaybeLocal and return from wrapEvaluateResult without setting errorString.

BUG=599947
R=dgozman@chromium.org

Committed: https://crrev.com/be7bba69f100b52764f24e5545356a09f72f540f
Cr-Commit-Position: refs/heads/master@{#385113}

[kozy, 2016-04-05 01:11:50]

Dmitry, please take a look.

[dgozman, 2016-04-05 01:27:43]

lgtm

[kozy, 2016-04-05 04:37:49]

The CQ bit was checked by kozyatinskiy@chromium.org

[commit-bot: I haz the power, 2016-04-05 04:38:10]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1862533002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1862533002/1

[commit-bot: I haz the power, 2016-04-05 06:03:16]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-04-05 06:04:28]

Description was changed from

==========
[DevTools] Speculative chrome os tests fix

After analysis every return point of V8RuntimAgentImpl::evaluate only one
suspicious return was found in InjectedScript::wrapValue.
If function.call returns empty value without exception then we return empty
MaybeLocal and return from wrapEvaluateResult without setting errorString.

BUG=599947
R=dgozman@chromium.org
==========

to

==========
[DevTools] Speculative chrome os tests fix

After analysis every return point of V8RuntimAgentImpl::evaluate only one
suspicious return was found in InjectedScript::wrapValue.
If function.call returns empty value without exception then we return empty
MaybeLocal and return from wrapEvaluateResult without setting errorString.

BUG=599947
R=dgozman@chromium.org

Committed: https://crrev.com/be7bba69f100b52764f24e5545356a09f72f540f
Cr-Commit-Position: refs/heads/master@{#385113}
==========

[commit-bot: I haz the power, 2016-04-05 06:04:29]

Patchset 1 (id:??) landed as
https://crrev.com/be7bba69f100b52764f24e5545356a09f72f540f
Cr-Commit-Position: refs/heads/master@{#385113}