[Merge to M58] cros: Fix immersive fullscreen tabstrip revealing does not draw well

[Merge to M58] cros: Fix immersive fullscreen tabstrip revealing does not draw well

Changes:
When OnImmersiveRevealStarted(), if top container's layer is not marked as not filling bounds opaquely, the tabstrip may not draw correctly. It happens when user has theme installed or hovers mouse onto tabstrip.

Regression comes from: https://codereview.chromium.org/2674813002.

TBR=pkotwicz@chromium.org, sky@chromium.org, estade@chromium.org
BUG=697099
TEST=device test bug does not happen

Review-Url: https://codereview.chromium.org/2728063002
Cr-Commit-Position: refs/heads/master@{#454896}
(cherry picked from commit bc2aafec33859883cdd69a43b301a40a79ce9327)

Review-Url: https://codereview.chromium.org/2740463003 .
Cr-Commit-Position: refs/branch-heads/3029@{#49}
Cr-Branched-From: 939b32ee5ba05c396eef3fd992822fcca9a2e262-refs/heads/master@{#454471}
Committed: https://chromium.googlesource.com/chromium/src/+/a8d551ee7fd1e0621d9b6aeaf40d60c98729e8f9

[Qiang(Joe) Xu, 2017-03-07 19:51:03]

Description was changed from

==========
[Merge to M58] cros: Fix immersive fullscreen tabstrip revealing does not draw
well

Changes:
When OnImmersiveRevealStarted(), if top container's layer is not marked as not
filling bounds opaquely, the tabstrip may not draw correctly. It happens when
user has theme installed or hovers mouse onto tabstrip.

Regression comes from: https://codereview.chromium.org/2674813002.

TBR=pkotwicz@chromium.org, sky@chromium.org, estade@chromium.org
BUG=697099
TEST=device test bug does not happen

Review-Url: https://codereview.chromium.org/2728063002
Cr-Commit-Position: refs/heads/master@{#454896}
(cherry picked from commit bc2aafec33859883cdd69a43b301a40a79ce9327)
==========

to

==========
[Merge to M58] cros: Fix immersive fullscreen tabstrip revealing does not draw
well

Changes:
When OnImmersiveRevealStarted(), if top container's layer is not marked as not
filling bounds opaquely, the tabstrip may not draw correctly. It happens when
user has theme installed or hovers mouse onto tabstrip.

Regression comes from: https://codereview.chromium.org/2674813002.

TBR=pkotwicz@chromium.org, sky@chromium.org, estade@chromium.org
BUG=697099
TEST=device test bug does not happen

Review-Url: https://codereview.chromium.org/2728063002
Cr-Commit-Position: refs/heads/master@{#454896}
(cherry picked from commit bc2aafec33859883cdd69a43b301a40a79ce9327)

Review-Url: https://codereview.chromium.org/2740463003 .
Cr-Commit-Position: refs/branch-heads/3029@{#49}
Cr-Branched-From:
939b32ee5ba05c396eef3fd992822fcca9a2e262-refs/heads/master@{#454471}
Committed:
https://chromium.googlesource.com/chromium/src/+/a8d551ee7fd1e0621d9b6aeaf40d...
==========

[Qiang(Joe) Xu, 2017-03-07 19:51:04]

Committed patchset #1 (id:1) manually as
a8d551ee7fd1e0621d9b6aeaf40d60c98729e8f9 (presubmit successful).