chrome/android: Fix black flash on cold start.

chrome/android: Fix black flash on cold start.

We currently see a black flash on cold start with some pages because
the logic uses the SwapBuffers notification to hide the background color
on the View to make the underlying Surface visible.

Since the SwapBuffers notification doesn't ensure that the rendering
has finished, it may not actually be used by the SurfaceFlinger which
causes a black flash.

Since we have similar logic for the tab strip which is also drawn in
native, merge this logic in one place and remove the background only
after the second frame is drawn.

BUG=729278
Review-Url: https://codereview.chromium.org/2926803003
Cr-Original-Commit-Position: refs/heads/master@{#477774}
Review-Url: https://codereview.chromium.org/2928703006 .
Cr-Commit-Position: refs/branch-heads/3112@{#244}
Cr-Branched-From: b6460e24cf59f429d69de255538d0fc7a425ccf9-refs/heads/master@{#474897}
Committed: https://chromium.googlesource.com/chromium/src/+/d317f0434ffd4eacbe8f4f412da254a411cf34ea

[Khushal, 2017-06-08 01:22:35]

Description was changed from

==========
chrome/android: Fix black flash on cold start.

We currently see a black flash on cold start with some pages because
the logic uses the SwapBuffers notification to hide the background color
on the View to make the underlying Surface visible.

Since the SwapBuffers notification doesn't ensure that the rendering
has finished, it may not actually be used by the SurfaceFlinger which
causes a black flash.

Since we have similar logic for the tab strip which is also drawn in
native, merge this logic in one place and remove the background only
after the second frame is drawn.

BUG=729278

Review-Url: https://codereview.chromium.org/2926803003
Cr-Commit-Position: refs/heads/master@{#477774}
(cherry picked from commit 481b7bd458ec703fbe99d111424a7a260658f185)
==========

to

==========
chrome/android: Fix black flash on cold start.

We currently see a black flash on cold start with some pages because
the logic uses the SwapBuffers notification to hide the background color
on the View to make the underlying Surface visible.

Since the SwapBuffers notification doesn't ensure that the rendering
has finished, it may not actually be used by the SurfaceFlinger which
causes a black flash.

Since we have similar logic for the tab strip which is also drawn in
native, merge this logic in one place and remove the background only
after the second frame is drawn.

BUG=729278

Review-Url: https://codereview.chromium.org/2926803003
Cr-Original-Commit-Position: refs/heads/master@{#477774}
Review-Url: https://codereview.chromium.org/2928703006 .
Cr-Commit-Position: refs/branch-heads/3112@{#244}
Cr-Branched-From:
b6460e24cf59f429d69de255538d0fc7a425ccf9-refs/heads/master@{#474897}
Committed:
https://chromium.googlesource.com/chromium/src/+/d317f0434ffd4eacbe8f4f412da2...
==========

[Khushal, 2017-06-08 01:22:36]

Committed patchset #1 (id:1) manually as
d317f0434ffd4eacbe8f4f412da254a411cf34ea.