Disable redraw lock when using DirectComposition.

Disable redraw lock when using DirectComposition.

This can cause windows to flicker black when they're made invisible. It
should also be unnecessary, as WS_CLIPCHILDREN should prevent
DefWindowProc from modifying window contents in the area where Chrome is
rendering.

BUG=667731
Review-Url: https://codereview.chromium.org/2536983002
Cr-Commit-Position: refs/heads/master@{#435203}
(cherry picked from commit b31f7c090c114097fc46ca120a3d0d221a238e88)

Committed: https://chromium.googlesource.com/chromium/src/+/5d94bf35db9e4bbf1fc7562992962bb651380521

[jbauman, 2016-12-08 02:26:41]

Description was changed from

==========
Disable redraw lock when using DirectComposition.

This can cause windows to flicker black when they're made invisible. It
should also be unnecessary, as WS_CLIPCHILDREN should prevent
DefWindowProc from modifying window contents in the area where Chrome is
rendering.

BUG=667731

Review-Url: https://codereview.chromium.org/2536983002
Cr-Commit-Position: refs/heads/master@{#435203}
(cherry picked from commit b31f7c090c114097fc46ca120a3d0d221a238e88)
==========

to

==========
Disable redraw lock when using DirectComposition.

This can cause windows to flicker black when they're made invisible. It
should also be unnecessary, as WS_CLIPCHILDREN should prevent
DefWindowProc from modifying window contents in the area where Chrome is
rendering.

BUG=667731

Review-Url: https://codereview.chromium.org/2536983002
Cr-Commit-Position: refs/heads/master@{#435203}
(cherry picked from commit b31f7c090c114097fc46ca120a3d0d221a238e88)

Committed:
https://chromium.googlesource.com/chromium/src/+/5d94bf35db9e4bbf1fc756299296...
==========

[jbauman, 2016-12-08 02:26:42]

Committed patchset #1 (id:1) manually as
5d94bf35db9e4bbf1fc7562992962bb651380521.