cc: Remove DCHECK for invalid image

cc: Remove DCHECK for invalid image

This appears to happen sometimes due to render process shutdown racing
with drawing a frame using software resources from that renderer.
Previously this wouldn't DCHECK at all and would just early out.

BUG=626203, chromedriver:1418
CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel

Review-Url: https://codereview.chromium.org/2132723002
Cr-Commit-Position: refs/heads/master@{#404251}
(cherry picked from commit 011f68cd2fa0d9fff7fd9808043d6a7fae6e478c)

Committed: https://chromium.googlesource.com/chromium/src/+/26d84ddd5e900ab6f508b2fbf72a1caa9b1f8a51

[enne (OOO), 2016-07-28 19:08:02]

Description was changed from

==========
cc: Remove DCHECK for invalid image

This appears to happen sometimes due to render process shutdown racing
with drawing a frame using software resources from that renderer.
Previously this wouldn't DCHECK at all and would just early out.

BUG=626203,chromedriver:1418
CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel

Review-Url: https://codereview.chromium.org/2132723002
Cr-Commit-Position: refs/heads/master@{#404251}
(cherry picked from commit 011f68cd2fa0d9fff7fd9808043d6a7fae6e478c)
==========

to

==========
cc: Remove DCHECK for invalid image

This appears to happen sometimes due to render process shutdown racing
with drawing a frame using software resources from that renderer.
Previously this wouldn't DCHECK at all and would just early out.

BUG=626203,chromedriver:1418
CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel

Review-Url: https://codereview.chromium.org/2132723002
Cr-Commit-Position: refs/heads/master@{#404251}
(cherry picked from commit 011f68cd2fa0d9fff7fd9808043d6a7fae6e478c)

Committed:
https://chromium.googlesource.com/chromium/src/+/26d84ddd5e900ab6f508b2fbf72a...
==========

[enne (OOO), 2016-07-28 19:08:03]

Committed patchset #1 (id:1) manually as
26d84ddd5e900ab6f508b2fbf72a1caa9b1f8a51.