cc: Force update tile priorities for pending tree tiling set on commit.

cc: Force update tile priorities for pending tree tiling set on commit.

Forcing |UpdateTilePriorities| for pending tree tiling sets to prevent
checkerboarding for cases where compositor is heavily pipelined. In
these cases it's possible for a commit to happen after |PrepareTiles| is
called during draw. The commit then skips |PrepareTiles| and activates
the pending tree causing checkerboarding.

|PrepareTiles| is skipped because of a |PictureLayerTilingSet| early out
optimization that relies on frame time and viewport to avoid updating
tiles. To fix this the tile priorities are always updated on commit.

BUG=664007
R=vmpstr@chromium.org
TEST=unittest + manual testing on samus
CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_trusty_blink_rel

Review-Url: https://codereview.chromium.org/2529533002
Cr-Commit-Position: refs/heads/master@{#434236}
(cherry picked from commit 53fabb1f55e8db09a8bd53ca7af11c2c96667af3)

Committed: https://chromium.googlesource.com/chromium/src/+/c42c5358255976cf362d5bda542107bcbef52af6

[sunnyps, 2016-11-28 23:31:14]

Description was changed from

==========
cc: Force update tile priorities for pending tree tiling set on commit.

Forcing |UpdateTilePriorities| for pending tree tiling sets to prevent
checkerboarding for cases where compositor is heavily pipelined. In
these cases it's possible for a commit to happen after |PrepareTiles| is
called during draw. The commit then skips |PrepareTiles| and activates
the pending tree causing checkerboarding.

|PrepareTiles| is skipped because of a |PictureLayerTilingSet| early out
optimization that relies on frame time and viewport to avoid updating
tiles. To fix this the tile priorities are always updated on commit.

BUG=664007
R=vmpstr@chromium.org
TEST=unittest + manual testing on samus
CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_trusty_blink_rel

Review-Url: https://codereview.chromium.org/2529533002
Cr-Commit-Position: refs/heads/master@{#434236}
(cherry picked from commit 53fabb1f55e8db09a8bd53ca7af11c2c96667af3)
==========

to

==========
cc: Force update tile priorities for pending tree tiling set on commit.

Forcing |UpdateTilePriorities| for pending tree tiling sets to prevent
checkerboarding for cases where compositor is heavily pipelined. In
these cases it's possible for a commit to happen after |PrepareTiles| is
called during draw. The commit then skips |PrepareTiles| and activates
the pending tree causing checkerboarding.

|PrepareTiles| is skipped because of a |PictureLayerTilingSet| early out
optimization that relies on frame time and viewport to avoid updating
tiles. To fix this the tile priorities are always updated on commit.

BUG=664007
R=vmpstr@chromium.org
TEST=unittest + manual testing on samus
CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_trusty_blink_rel

Review-Url: https://codereview.chromium.org/2529533002
Cr-Commit-Position: refs/heads/master@{#434236}
(cherry picked from commit 53fabb1f55e8db09a8bd53ca7af11c2c96667af3)

Committed:
https://chromium.googlesource.com/chromium/src/+/c42c5358255976cf362d5bda5421...
==========

[sunnyps, 2016-11-28 23:31:15]

Committed patchset #1 (id:1) manually as
c42c5358255976cf362d5bda542107bcbef52af6.