Aura Window Capture: Ensure capture callback is always run.

Aura Window Capture: Ensure capture callback is always run.

The capture callback must always be run, or eventually the capture
decision logic will think there are too many captures in-flight.  This
closes some "holes" in content::AuraWindowCaptureMachine where methods
exit early without running the callback.  This is a potential fix for
crbug 600031.

BUG=600031
Review URL: https://codereview.chromium.org/1913283004

Cr-Commit-Position: refs/heads/master@{#389867}
(cherry picked from commit 47efd876604698bfebe78ef495d789148694f649)

Committed: https://chromium.googlesource.com/chromium/src/+/a6a5c05b36174ab04dc9ed3ec125b799e4182653

[miu, 2016-04-29 23:30:48]

Description was changed from

==========
Aura Window Capture: Ensure capture callback is always run.

The capture callback must always be run, or eventually the capture
decision logic will think there are too many captures in-flight.  This
closes some "holes" in content::AuraWindowCaptureMachine where methods
exit early without running the callback.  This is a potential fix for
crbug 600031.

BUG=600031

Review URL: https://codereview.chromium.org/1913283004

Cr-Commit-Position: refs/heads/master@{#389867}
(cherry picked from commit 47efd876604698bfebe78ef495d789148694f649)
==========

to

==========
Aura Window Capture: Ensure capture callback is always run.

The capture callback must always be run, or eventually the capture
decision logic will think there are too many captures in-flight.  This
closes some "holes" in content::AuraWindowCaptureMachine where methods
exit early without running the callback.  This is a potential fix for
crbug 600031.

BUG=600031

Review URL: https://codereview.chromium.org/1913283004

Cr-Commit-Position: refs/heads/master@{#389867}
(cherry picked from commit 47efd876604698bfebe78ef495d789148694f649)

Committed:
https://chromium.googlesource.com/chromium/src/+/a6a5c05b36174ab04dc9ed3ec125...
==========

[miu, 2016-04-29 23:30:49]

Committed patchset #1 (id:1) manually as
a6a5c05b36174ab04dc9ed3ec125b799e4182653.