Khushal offered to take a look.

Video of symptom:

Deleted: screenrecord-462645-20170606_142202.mp4 3.0 MB

	screenrecord-462645-20170606_142202.mp4 3.0 MB View Download

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/481b7bd458ec703fbe99d111424a7a260658f185

commit 481b7bd458ec703fbe99d111424a7a260658f185
Author: khushalsagar <khushalsagar@chromium.org>
Date: Wed Jun 07 23:24:11 2017

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}

[modify] https://crrev.com/481b7bd458ec703fbe99d111424a7a260658f185/chrome/android/java/src/org/chromium/chrome/browser/compositor/CompositorView.java
[modify] https://crrev.com/481b7bd458ec703fbe99d111424a7a260658f185/chrome/android/java/src/org/chromium/chrome/browser/compositor/CompositorViewHolder.java

Your change meets the bar and is auto-approved for M60. Please go ahead and merge the CL to branch 3112 manually. Please contact milestone owner if you have questions.
Owners: amineer@(Android), cmasso@(iOS), josafat@(ChromeOS), bustamante@(Desktop)

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/d317f0434ffd4eacbe8f4f412da254a411cf34ea

commit d317f0434ffd4eacbe8f4f412da254a411cf34ea
Author: Khushal <khushalsagar@chromium.org>
Date: Thu Jun 08 01:22:14 2017

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}

[modify] https://crrev.com/d317f0434ffd4eacbe8f4f412da254a411cf34ea/chrome/android/java/src/org/chromium/chrome/browser/compositor/CompositorView.java
[modify] https://crrev.com/d317f0434ffd4eacbe8f4f412da254a411cf34ea/chrome/android/java/src/org/chromium/chrome/browser/compositor/CompositorViewHolder.java

Thanks for the quick fix, I appreciate it!

No problem! :)

Noticed this was not merged to M59 yet, we've had respins in the past due to screen flicker issues.

This flicker is pretty rare and the fix has some risk of introducing other flickers so I'd like to give it time to bake.  I don't think it calls for a last-minute merge.