[Merge to 2623] Disable IOSurface clearing on OS X 10.9.

[Merge to 2623] Disable IOSurface clearing on OS X 10.9.

Doing so triggers PDF rendering problems on some GPUs.

BUG=594343
TBR=avi@chromium.org

Review URL: https://codereview.chromium.org/1826613002

Cr-Commit-Position: refs/heads/master@{#382739}
(cherry picked from commit f38d1ce51f77c495dffb59d9c8d557881f3df448)

Committed: https://chromium.googlesource.com/chromium/src/+/a0ecd929bf77adc013f3caaf244b36fe630c5a80

[erikchen, 2016-03-23 00:28:29]

Description was changed from

==========
[Merge to 2623] Disable IOSurface clearing on OS X 10.9.

Doing so triggers PDF rendering problems on some GPUs.

BUG=594343
TBR=avi@chromium.org

Review URL: https://codereview.chromium.org/1826613002

Cr-Commit-Position: refs/heads/master@{#382739}
(cherry picked from commit f38d1ce51f77c495dffb59d9c8d557881f3df448)
==========

to

==========
[Merge to 2623] Disable IOSurface clearing on OS X 10.9.

Doing so triggers PDF rendering problems on some GPUs.

BUG=594343
TBR=avi@chromium.org

Review URL: https://codereview.chromium.org/1826613002

Cr-Commit-Position: refs/heads/master@{#382739}
(cherry picked from commit f38d1ce51f77c495dffb59d9c8d557881f3df448)

Committed:
https://chromium.googlesource.com/chromium/src/+/a0ecd929bf77adc013f3caaf244b...
==========

[erikchen, 2016-03-23 00:28:31]

Committed patchset #1 (id:1) manually as
a0ecd929bf77adc013f3caaf244b36fe630c5a80.

[erikchen, 2016-03-23 00:29:35]

https://codereview.chromium.org/1825283003/diff/1/ui/gl/test/gl_image_test_te...
File ui/gl/test/gl_image_test_template.h (right):

https://codereview.chromium.org/1825283003/diff/1/ui/gl/test/gl_image_test_te...
ui/gl/test/gl_image_test_template.h:31: #endif
Whoops. The test wasn't a part of M49, and it looks like I forgot to get rid of
these extraneous includes during the merge resolution.

[Avi (use Gerrit), 2016-03-23 00:32:18]

lgtm