Fixes clang warning in GLSurfaceOzone.

Fixes clang warning in GLSurfaceOzone.

Introduced in https://codereview.chromium.org/938873002/

R=piman@chromium.org
BUG=None

Review URL: https://codereview.chromium.org/967343003

Cr-Commit-Position: refs/heads/master@{#318826}
(cherry picked from commit 8d23afa1dee0d0eaa1ed0782963c3a6ac263ae97)

Simplify FakeGpuProcess* video accelerator tests

Make DispatchToGpuPlatformSupportTask and DispatchToGpuPlatformSupportHostTask
statics, removing the weak ptrs (and failing DCHECKS in that code) altogether.

BUG=447798
Review URL: https://codereview.chromium.org/1017673003

Cr-Commit-Position: refs/heads/master@{#321212}
(cherry picked from commit 72b1eacd439fcb0bcf45ae7de2d8a9f578804ac6)

Fix at_exit error in video_decode tests

ui::OzoneGpuTestHelper needs to be uninstantiated in TearDown() since it
creates a base::Thread which wants to register with the AtExitManager.
However the AtExitManager runs out of scope before the
testing::Environment.

BUG=447798
TEST=compile and run ./video_decode_accelerator_unittest (I had
https://codereview.chromium.org/938873002/ applied as well to make sure
tests succeed)

Review URL: https://codereview.chromium.org/949183004

Cr-Commit-Position: refs/heads/master@{#319148}
(cherry picked from commit c7a207e106d84ac81344a7c7cef8394ed672f0a3)

Add a new API to create a surfaceless GLSurface for Ozone

Reverting CreateViewGLSurface to creating a surface that works as expected

Chrome uses the new surfaceless API, all others use the old one

BUG=447798
Review URL: https://codereview.chromium.org/938873002

Cr-Commit-Position: refs/heads/master@{#318786}
(cherry picked from commit e86e411c3038fd5be67438da29f0ff17828f226f)

ozone: dri: add synchronous SwapBuffers support on surfaceless

BUG=447798
TEST=ozone_unittests

Review URL: https://codereview.chromium.org/960273003

Cr-Commit-Position: refs/heads/master@{#318457}
(cherry picked from commit 210577c2e1b7bb0462ccbb7905c800568ba3888e)

Committed: https://chromium.googlesource.com/chromium/src/+/52dbe19e37811d992a10ac36f8f2419f837d2549

[dnicoara, 2015-03-30 15:45:36]

Committed patchset #1 (id:1) manually as
52dbe19e37811d992a10ac36f8f2419f837d2549.