content: Handle OutputSurface requests correctly.

content: Handle OutputSurface requests correctly.

If the compositor goes through a visible, invisible and visible sequence,
we would end up queuing 2 GpuChannelHost requests. In this case, the
OutputSurface request is handled when the first callback runs. So
instead of asserting that there is a pending OutputSurface request when
the response callback for the GpuChannel request runs, early out if the
OutputSurface request was already handled.

BUG=643852, 650219
Review-Url: https://codereview.chromium.org/2313683004
Cr-Commit-Position: refs/heads/master@{#416589}
(cherry picked from commit 2010e7dd770842c852284502b4503c7843d05ff3)

Committed: https://chromium.googlesource.com/chromium/src/+/c746ff375a2f4b47551c421cc71357a1ef8e4798

[Khushal, 2016-10-01 19:08:37]

Description was changed from

==========
content: Handle OutputSurface requests correctly.

If the compositor goes through a visible, invisible and visible sequence,
we would end up queuing 2 GpuChannelHost requests. In this case, the
OutputSurface request is handled when the first callback runs. So
instead of asserting that there is a pending OutputSurface request when
the response callback for the GpuChannel request runs, early out if the
OutputSurface request was already handled.

BUG=643852,650219

Review-Url: https://codereview.chromium.org/2313683004
Cr-Commit-Position: refs/heads/master@{#416589}
(cherry picked from commit 2010e7dd770842c852284502b4503c7843d05ff3)
==========

to

==========
content: Handle OutputSurface requests correctly.

If the compositor goes through a visible, invisible and visible sequence,
we would end up queuing 2 GpuChannelHost requests. In this case, the
OutputSurface request is handled when the first callback runs. So
instead of asserting that there is a pending OutputSurface request when
the response callback for the GpuChannel request runs, early out if the
OutputSurface request was already handled.

BUG=643852,650219

Review-Url: https://codereview.chromium.org/2313683004
Cr-Commit-Position: refs/heads/master@{#416589}
(cherry picked from commit 2010e7dd770842c852284502b4503c7843d05ff3)

Committed:
https://chromium.googlesource.com/chromium/src/+/c746ff375a2f4b47551c421cc713...
==========

[Khushal, 2016-10-01 19:08:39]

Committed patchset #1 (id:1) manually as
c746ff375a2f4b47551c421cc71357a1ef8e4798.