Revert of Add more strict DCHECKs around context state.

Revert of Add more strict DCHECKs around context state. (patchset #1 id:1 of https://codereview.chromium.org/2852353003/ )

Reason for revert:
Breaks an optimization needed on some Android devices for performance.


Original issue's description:
> Add more strict DCHECKs around context state.
> 
> Upon processing commands in the GLES2Decoder, assert that the context
> is current.
> 
> Make virtual contexts' definition of "current" more strict. This
> required moving a DCHECK inside the base GLContext class.
> 
> These aren't needed, but were useful during recent debugging to
> confirm that the bug wasn't in these areas.
> 
> BUG=694359
> 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/2852353003
> Cr-Commit-Position: refs/heads/master@{#469115}
> Committed: https://chromium.googlesource.com/chromium/src/+/a21cb49e77bf727d692bbe8dd8eda85a9d089e93

TBR=jbauman@chromium.org,zmo@chromium.org,piman@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=694359
Review-Url: https://codereview.chromium.org/2859963002
Cr-Commit-Position: refs/heads/master@{#469185}
Committed: https://chromium.googlesource.com/chromium/src/+/84c6c1ca98f4352c0d487e414df24a5e7ef8a4df

[Ken Russell (switch to Gerrit), 2017-05-03 23:06:06]

The CQ bit was checked by kbr@chromium.org

[Ken Russell (switch to Gerrit), 2017-05-03 23:06:07]

Created Revert of Add more strict DCHECKs around context state.

[commit-bot: I haz the power, 2017-05-03 23:06:44]

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, 2017-05-03 23:07:48]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1493852766730510, "parent_rev":
"96e6946fbce26ef707a1c37f935be1b011a57ded", "commit_rev":
"84c6c1ca98f4352c0d487e414df24a5e7ef8a4df"}

[commit-bot: I haz the power, 2017-05-03 23:08:04]

Description was changed from

==========
Revert of Add more strict DCHECKs around context state. (patchset #1 id:1 of
https://codereview.chromium.org/2852353003/ )

Reason for revert:
Breaks an optimization needed on some Android devices for performance.


Original issue's description:
> Add more strict DCHECKs around context state.
> 
> Upon processing commands in the GLES2Decoder, assert that the context
> is current.
> 
> Make virtual contexts' definition of "current" more strict. This
> required moving a DCHECK inside the base GLContext class.
> 
> These aren't needed, but were useful during recent debugging to
> confirm that the bug wasn't in these areas.
> 
> BUG=694359
>
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/2852353003
> Cr-Commit-Position: refs/heads/master@{#469115}
> Committed:
https://chromium.googlesource.com/chromium/src/+/a21cb49e77bf727d692bbe8dd8ed...

TBR=jbauman@chromium.org,zmo@chromium.org,piman@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=694359
==========

to

==========
Revert of Add more strict DCHECKs around context state. (patchset #1 id:1 of
https://codereview.chromium.org/2852353003/ )

Reason for revert:
Breaks an optimization needed on some Android devices for performance.


Original issue's description:
> Add more strict DCHECKs around context state.
> 
> Upon processing commands in the GLES2Decoder, assert that the context
> is current.
> 
> Make virtual contexts' definition of "current" more strict. This
> required moving a DCHECK inside the base GLContext class.
> 
> These aren't needed, but were useful during recent debugging to
> confirm that the bug wasn't in these areas.
> 
> BUG=694359
>
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/2852353003
> Cr-Commit-Position: refs/heads/master@{#469115}
> Committed:
https://chromium.googlesource.com/chromium/src/+/a21cb49e77bf727d692bbe8dd8ed...

TBR=jbauman@chromium.org,zmo@chromium.org,piman@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=694359

Review-Url: https://codereview.chromium.org/2859963002
Cr-Commit-Position: refs/heads/master@{#469185}
Committed:
https://chromium.googlesource.com/chromium/src/+/84c6c1ca98f4352c0d487e414df2...
==========

[commit-bot: I haz the power, 2017-05-03 23:08:05]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/84c6c1ca98f4352c0d487e414df2...