[GPU Workaround] Re-enable disable_chromium_framebuffer_multisample on Nexus 7g2 and alike

[GPU Workaround] Re-enable disable_chromium_framebuffer_multisample on Nexus 7g2 and alike

Somehow it has an interaction with the other workaround
force_update_scissor_state_when_binding_fbo0, disabling it would make
https://crbug.com/670607 to repro again. This CL re-enables it.
WebGL2 support on those devices are disabled as well.

BUG=698197
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/2760073003
Cr-Commit-Position: refs/heads/master@{#459965}
(cherry picked from commit 06be3b5e0202f6c0b4aa4fc331e74ceada3f18ba)

Review-Url: https://codereview.chromium.org/2784723003 .
Cr-Commit-Position: refs/branch-heads/3029@{#463}
Cr-Branched-From: 939b32ee5ba05c396eef3fd992822fcca9a2e262-refs/heads/master@{#454471}
Committed: https://chromium.googlesource.com/chromium/src/+/a55e0824b49b7c0f6a6165315df3e744786e3365

[trchen, 2017-03-28 23:19:26]

Description was changed from

==========
[GPU Workaround] Re-enable disable_chromium_framebuffer_multisample on Nexus 7g2
and alike

Somehow it has an interaction with the other workaround
force_update_scissor_state_when_binding_fbo0, disabling it would make
https://crbug.com/670607 to repro again. This CL re-enables it.
WebGL2 support on those devices are disabled as well.

BUG=698197
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/2760073003
Cr-Commit-Position: refs/heads/master@{#459965}
(cherry picked from commit 06be3b5e0202f6c0b4aa4fc331e74ceada3f18ba)
==========

to

==========
[GPU Workaround] Re-enable disable_chromium_framebuffer_multisample on Nexus 7g2
and alike

Somehow it has an interaction with the other workaround
force_update_scissor_state_when_binding_fbo0, disabling it would make
https://crbug.com/670607 to repro again. This CL re-enables it.
WebGL2 support on those devices are disabled as well.

BUG=698197
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/2760073003
Cr-Commit-Position: refs/heads/master@{#459965}
(cherry picked from commit 06be3b5e0202f6c0b4aa4fc331e74ceada3f18ba)

Review-Url: https://codereview.chromium.org/2784723003 .
Cr-Commit-Position: refs/branch-heads/3029@{#463}
Cr-Branched-From:
939b32ee5ba05c396eef3fd992822fcca9a2e262-refs/heads/master@{#454471}
Committed:
https://chromium.googlesource.com/chromium/src/+/a55e0824b49b7c0f6a6165315df3...
==========

[trchen, 2017-03-28 23:19:27]

Committed patchset #1 (id:1) manually as
a55e0824b49b7c0f6a6165315df3e744786e3365.