Issue 732613  has been merged into this issue.

Robert is bisecting Chrome right now.

commit	10b29d38bbd2eb90d7d93fb07214d468f7af7dde by Kai Ninomiya <kainino@chromium.org> breaks webgl on arm devices:

"Workaround for Qualcomm renderbuffer resize bug
Also re-enables the explicit resolve path on the Qualcomm devices which
have EXT_multisampled_render_to_texture disabled."

Will try to extract this commit from the top of the tree.

revert at https://codereview.chromium.org/2936973003/

Not sure why this is P3, this is P1 since we can't ship with that.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/a2205e65faf366cf1748e6a72c4a41188b07e05b

commit a2205e65faf366cf1748e6a72c4a41188b07e05b
Author: marcheu <marcheu@google.com>
Date: Wed Jun 14 05:03:30 2017

Revert "Workaround for Qualcomm renderbuffer resize bug"

This reverts commit 10b29d38bbd2eb90d7d93fb07214d468f7af7dde.

This breaks WebGL on ARM Chromebooks.

BUG= chromium:732616 
TEST=webgl works again on Chrome OS
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.android:android_optional_gpu_tests_rel;master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel

Review-Url: https://codereview.chromium.org/2936973003
Cr-Commit-Position: refs/heads/master@{#479289}

[modify] https://crrev.com/a2205e65faf366cf1748e6a72c4a41188b07e05b/gpu/command_buffer/service/gles2_cmd_decoder.cc
[modify] https://crrev.com/a2205e65faf366cf1748e6a72c4a41188b07e05b/gpu/command_buffer/service/gles2_cmd_decoder_unittest_base.cc
[modify] https://crrev.com/a2205e65faf366cf1748e6a72c4a41188b07e05b/gpu/command_buffer/service/gles2_cmd_decoder_unittest_base.h
[modify] https://crrev.com/a2205e65faf366cf1748e6a72c4a41188b07e05b/gpu/command_buffer/service/gles2_cmd_decoder_unittest_framebuffers.cc
[modify] https://crrev.com/a2205e65faf366cf1748e6a72c4a41188b07e05b/gpu/command_buffer/service/renderbuffer_manager.cc
[modify] https://crrev.com/a2205e65faf366cf1748e6a72c4a41188b07e05b/gpu/command_buffer/service/renderbuffer_manager.h
[modify] https://crrev.com/a2205e65faf366cf1748e6a72c4a41188b07e05b/gpu/config/gpu_driver_bug_list.json
[modify] https://crrev.com/a2205e65faf366cf1748e6a72c4a41188b07e05b/gpu/config/gpu_driver_bug_workaround_type.h

It's unfortunate that this was reverted. Could someone from the Chrome OS team work with me to debug why that driver bug workaround broke things on ARM Chromebooks? Certainly the workaround itself was not supposed to take effect on ARM GPUs.

We debugged this together and the breaking commit has been reverted and the adjustment to the original code is understood.

Verified.
https://wmatrix.googleplex.com/unfiltered?hide_missing=True&releases=tot&tests=graphics_WebGLAquarium