Switch main GPU thread to Default Message Pump

Switch main GPU thread to Default Message Pump

Since all windows has been moved from the main GPU thread
to a separate dedicated thread there is no need to run
UI message pump on the main thread.

This change switches the main GPU thread, on OS_WIN only,
to MessagePumpDefault. This should make MessagePumpForGpu
unnecessary. I am going to remove it in a separate change.

CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.win:win_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.android:android_optional_gpu_tests_rel

BUG=653181
Review-Url: https://codereview.chromium.org/2432013004
Cr-Commit-Position: refs/heads/master@{#430758}
(cherry picked from commit 5599ccdfa0d4167f13880db3560d8ad829157069)

Committed: https://chromium.googlesource.com/chromium/src/+/670b912948b9218a82afbe411c305f10561f1588

[stanisc, 2016-11-18 23:34:21]

Description was changed from

==========
Switch main GPU thread to Default Message Pump

Since all windows has been moved from the main GPU thread
to a separate dedicated thread there is no need to run
UI message pump on the main thread.

This change switches the main GPU thread, on OS_WIN only,
to MessagePumpDefault. This should make MessagePumpForGpu
unnecessary. I am going to remove it in a separate change.

CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.win:win_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.android:android_optional_gpu_tests_rel

BUG=653181

Review-Url: https://codereview.chromium.org/2432013004
Cr-Commit-Position: refs/heads/master@{#430758}
(cherry picked from commit 5599ccdfa0d4167f13880db3560d8ad829157069)
==========

to

==========
Switch main GPU thread to Default Message Pump

Since all windows has been moved from the main GPU thread
to a separate dedicated thread there is no need to run
UI message pump on the main thread.

This change switches the main GPU thread, on OS_WIN only,
to MessagePumpDefault. This should make MessagePumpForGpu
unnecessary. I am going to remove it in a separate change.

CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.win:win_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.android:android_optional_gpu_tests_rel

BUG=653181

Review-Url: https://codereview.chromium.org/2432013004
Cr-Commit-Position: refs/heads/master@{#430758}
(cherry picked from commit 5599ccdfa0d4167f13880db3560d8ad829157069)

Committed:
https://chromium.googlesource.com/chromium/src/+/670b912948b9218a82afbe411c30...
==========

[stanisc, 2016-11-18 23:34:23]

Committed patchset #1 (id:1) manually as
670b912948b9218a82afbe411c305f10561f1588.