Issue 726240 has been merged into this issue.

Note:
1) Good Build: 60.0.3109.0
   Bad Build:  60.0.3110.0
2) Bisect range: https://chromium.googlesource.com/chromium/src/+log/60.0.3109.0..60.0.3110.0?pretty=fuller&n=10000
3) Please find logs and video @ http://go/chrome-androidlogs1/6/726226
4) Unable to find the exact culprit as an exception "We don't have enough builds to bisect" is getting thrown when tried to bisect builds
5) This issue is observed only on N and O devices not observed on other devices

 Issue 726379  has been merged into this issue.

 Issue 726368  has been merged into this issue.

I *think* this is only happens when gpu raster is enabled. Someone can double check by setting --disable-gpu-rasterization

Confirmed, only reproes with GPU raster.

Not see this issue after disable gpu-rasterization

Still repro on ToT r474709

Bisected to this skia roll: https://chromium-review.googlesource.com/513374
Then this skia CL: https://skia-review.googlesource.com/17824

still reverts cleanly and fixes this. revert first, ask questions later?

oh already reverted

Yep. I will need to merge the revert to the Skia branch for M60, which has already been created.

The following revision refers to this bug:
  https://skia.googlesource.com/skia/+/1c214313248a4b5a69af14539608c54fb67c2bf8

commit 1c214313248a4b5a69af14539608c54fb67c2bf8
Author: Brian Salomon <bsalomon@google.com>
Date: Thu May 25 20:03:07 2017

Revert "Clear atlas textures at creation in Chrome"

This reverts commit 8785df15fe5a57651597d138d3c5aea0ffe3f661.

Reason for revert: Chrome bug
Bug:  chromium:726226 

Original change's description:
> Clear atlas textures at creation in Chrome
> 
> Bug: chromium:656320
> Change-Id: Ia65274aa733f199be188579821e745920493aefc
> Reviewed-on: https://skia-review.googlesource.com/17824
> Reviewed-by: Robert Phillips <robertphillips@google.com>
> Commit-Queue: Brian Salomon <bsalomon@google.com>
> 

TBR=bsalomon@google.com,robertphillips@google.com
# Not skipping CQ checks because original CL landed > 1 day ago.
Bug: chromium:656320

Change-Id: Ibc4dd7f184866b58481f2dc7e7e88da9169e7adc
Reviewed-on: https://skia-review.googlesource.com/17988
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>

[modify] https://crrev.com/1c214313248a4b5a69af14539608c54fb67c2bf8/include/gpu/GrCaps.h
[modify] https://crrev.com/1c214313248a4b5a69af14539608c54fb67c2bf8/src/gpu/GrDrawOpAtlas.cpp
[modify] https://crrev.com/1c214313248a4b5a69af14539608c54fb67c2bf8/src/gpu/gl/GrGLCaps.cpp
[modify] https://crrev.com/1c214313248a4b5a69af14539608c54fb67c2bf8/src/gpu/GrCaps.cpp

The following revision refers to this bug:
  https://skia.googlesource.com/skia/+/89ca3a3b0210355a40bc0bc0ffd0104f91b67997

commit 89ca3a3b0210355a40bc0bc0ffd0104f91b67997
Author: Brian Salomon <bsalomon@google.com>
Date: Thu May 25 20:28:48 2017

Revert "Clear atlas textures at creation in Chrome"

This reverts commit 8785df15fe5a57651597d138d3c5aea0ffe3f661.

Reason for revert: Chrome bug
Bug:  chromium:726226 

Original change's description:
> Clear atlas textures at creation in Chrome
>
> Bug: chromium:656320
> Change-Id: Ia65274aa733f199be188579821e745920493aefc
> Reviewed-on: https://skia-review.googlesource.com/17824
> Reviewed-by: Robert Phillips <robertphillips@google.com>
> Commit-Queue: Brian Salomon <bsalomon@google.com>
>

TBR=bsalomon@google.com,robertphillips@google.com
Bug: chromium:656320

No-Tree-Checks: true
No-Try: true
No-Presubmit: true
Change-Id: Ibc4dd7f184866b58481f2dc7e7e88da9169e7adc
Reviewed-On: https://skia-review.googlesource.com/17988
Reviewed-By: Brian Salomon <bsalomon@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
Reviewed-on: https://skia-review.googlesource.com/17991

[modify] https://crrev.com/89ca3a3b0210355a40bc0bc0ffd0104f91b67997/include/gpu/GrCaps.h
[modify] https://crrev.com/89ca3a3b0210355a40bc0bc0ffd0104f91b67997/src/gpu/GrDrawOpAtlas.cpp
[modify] https://crrev.com/89ca3a3b0210355a40bc0bc0ffd0104f91b67997/src/gpu/gl/GrGLCaps.cpp
[modify] https://crrev.com/89ca3a3b0210355a40bc0bc0ffd0104f91b67997/src/gpu/GrCaps.cpp

This is reverted on Skia master and Skia M60. However, the Skia autoroller is paused until Chrome branches for M60. At that point the M60 branch of Chrome will pick up the M60 branch of Skia and get the fix. Also, the autoroller will restart and Chrome master will get the fix.

I've been able to reproduce this locally on several phones with different Adreno GPUs but not on my linux desktop or phones with GPUs from different vendors. I'm starting to wonder if this is a driver issue.

 Issue 726587  has been merged into this issue.

 Issue 726357  has been merged into this issue.

This appears to be an Adreno driver bug when we clear the single channel texture used for the grayscale glyph atlas.

I've made the following discoveries:

Inserting a glFlush() after the clear fixes it.

Oddly this still reproduces even when glColorMask is set to all GL_FALSE before glClear(GL_COLOR_BUFFER_BIT) is called.

I don't seem to be able to reproduce this in standalone Skia testing, just in Chrome. Perhaps there is something done by the command buffer or gpu process that is necessary for the repro.

 Issue 726756  has been merged into this issue.

Branch 3112 is the M60 candidate (we'll still need explicit confirmation but I expect it shortly).  I pinned that branch to the m60 Skia branch and kicked a build, should deploy in ~2-3 hours.

I checked all the duplicate bug reports and they're on various Adreno 4xx and Adreno 5xx.  I'd suggest adding a GPU-service-side workaround targeted to those GPU ranges before the reland.

 Issue 726790  has been merged into this issue.

60.0.3112.3 is rolling out to canary now and will fix this.

This issue is not reproducible on all devices on latest 60.0.3112.6, hence verified

 Issue 726802  has been merged into this issue.

 Issue 727027  has been merged into this issue.

 Issue 726528  has been merged into this issue.