Revert of Select correct copy method for DoCopySubTexture

Revert of Select correct copy method for DoCopySubTexture (patchset #1 id:1 of https://codereview.chromium.org/2680703003/ )

Reason for revert:
The new DoCopySubTexture causes a performance regression on WebGL on Chrome OS.
    
BUG=chromium:691741
TEST=on celes, webgl performance is back to normal


Original issue's description:
> Select correct copy method for DoCopySubTexture
> 
> BUG=687180
> CQ_INCLUDE_TRYBOTS=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/2680703003
> Cr-Commit-Position: refs/heads/master@{#448905}
> Committed: https://chromium.googlesource.com/chromium/src/+/a8450b810e89819add240a319586c899683dff9f

TBR=kbr@chromium.org,zmo@chromium.org,yunchao.he@intel.com,dongseong.hwang@intel.com,qiankun.miao@intel.com
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=687180
Review-Url: https://codereview.chromium.org/2695833003
Cr-Commit-Position: refs/heads/master@{#450212}
Committed: https://chromium.googlesource.com/chromium/src/+/2404c8ae0098fa7cae48db92222240293a9d2689

[marcheu, 2017-02-14 01:03:56]

The CQ bit was checked by marcheu@chromium.org

[marcheu, 2017-02-14 01:03:56]

Created Revert of Select correct copy method for DoCopySubTexture

[commit-bot: I haz the power, 2017-02-14 01:04:49]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[marcheu, 2017-02-14 01:07:46]

The CQ bit was unchecked by marcheu@chromium.org

[marcheu, 2017-02-14 01:08:01]

The CQ bit was checked by marcheu@chromium.org

[commit-bot: I haz the power, 2017-02-14 01:08:38]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-02-14 02:49:02]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1487034481278850, "parent_rev":
"b00ec102d2503c9128c261a21824ac057dc8d357", "commit_rev":
"2404c8ae0098fa7cae48db92222240293a9d2689"}

[commit-bot: I haz the power, 2017-02-14 02:49:34]

Description was changed from

==========
Revert of Select correct copy method for DoCopySubTexture (patchset #1 id:1 of
https://codereview.chromium.org/2680703003/ )

Reason for revert:
The new DoCopySubTexture causes a performance regression on WebGL on Chrome OS.
    
BUG=chromium:691741
TEST=on celes, webgl performance is back to normal


Original issue's description:
> Select correct copy method for DoCopySubTexture
> 
> BUG=687180
>
CQ_INCLUDE_TRYBOTS=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/2680703003
> Cr-Commit-Position: refs/heads/master@{#448905}
> Committed:
https://chromium.googlesource.com/chromium/src/+/a8450b810e89819add240a319586...

TBR=kbr@chromium.org,zmo@chromium.org,yunchao.he@intel.com,dongseong.hwang@in...
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=687180
==========

to

==========
Revert of Select correct copy method for DoCopySubTexture (patchset #1 id:1 of
https://codereview.chromium.org/2680703003/ )

Reason for revert:
The new DoCopySubTexture causes a performance regression on WebGL on Chrome OS.
    
BUG=chromium:691741
TEST=on celes, webgl performance is back to normal


Original issue's description:
> Select correct copy method for DoCopySubTexture
> 
> BUG=687180
>
CQ_INCLUDE_TRYBOTS=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/2680703003
> Cr-Commit-Position: refs/heads/master@{#448905}
> Committed:
https://chromium.googlesource.com/chromium/src/+/a8450b810e89819add240a319586...

TBR=kbr@chromium.org,zmo@chromium.org,yunchao.he@intel.com,dongseong.hwang@in...
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=687180

Review-Url: https://codereview.chromium.org/2695833003
Cr-Commit-Position: refs/heads/master@{#450212}
Committed:
https://chromium.googlesource.com/chromium/src/+/2404c8ae0098fa7cae48db922222...
==========

[commit-bot: I haz the power, 2017-02-14 02:49:35]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/2404c8ae0098fa7cae48db922222...