Invalidate DXVA IMFTransform on Flush()

Invalidate DXVA IMFTransform on Flush()

The transform can become invalid when changing resolution between DASH
streams.

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

[jbauman, 2017-06-06 23:44:01]

Description was changed from

==========
Invalidate DXVA IMFTransform on Flush()

The transform can become invalid when changing resolution between DASH
streams.

BUG=
==========

to

==========
Invalidate DXVA IMFTransform on Flush()

The transform can become invalid when changing resolution between DASH
streams.

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

[jbauman, 2017-06-06 23:44:07]

The CQ bit was checked by jbauman@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2017-06-06 23:44:25]

Dry run: CQ is trying da patch.

Follow status at:
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-06-07 03:41:24]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-06-07 03:41:25]

Dry run: Try jobs failed on following builders:
  win_chromium_rel_ng on master.tryserver.chromium.win (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_rel_...)