Remove nullchecks for the provider's context.

Remove nullchecks for the provider's context.

If the provider is not null, it will have a context that is not null.
The provider is a WebGraphicsContext3DProviderImpl, which is given
a ContextProviderWebContext.

The ContextProviderWebContext is a ContextProviderCommandBuffer, the
factory for which returns a null provider if the underlying context
is null.

Further, the provider comes from RenderThreadImpl's
SharedMainThreadContextProvider(), which will return null if
the provider is null, or if the provider fails to initialize its
GL context.

R=junov@chromium.org, kbr@chromium.org
BUG=584497
Committed: https://crrev.com/0b5fbe3c7b257fde5861ad986ec77b2c9f6c23c1
Cr-Commit-Position: refs/heads/master@{#381765}

[danakj, 2016-03-17 01:05:40]

Some citations:

https://code.google.com/p/chromium/codesearch#chromium/src/content/renderer/r...
creates the shared ContextProvider.

https://code.google.com/p/chromium/codesearch#chromium/src/content/renderer/r...
constructs the WebGC3DProviderImpl, and gives it the result from the above. If
the underlying provider there is null, it gives a null WebGC3DProvider instead.

[danakj, 2016-03-17 01:05:44]

The CQ bit was checked by danakj@chromium.org to run a CQ dry run

[danakj, 2016-03-17 01:05:58]

danakj@chromium.org changed reviewers:
+ piman@chromium.org

[danakj, 2016-03-17 01:05:58]

+piman for content/

[commit-bot: I haz the power, 2016-03-17 01:06:13]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1813603003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1813603003/1

[danakj, 2016-03-17 01:12:07]

The CQ bit was unchecked by danakj@chromium.org

[piman, 2016-03-17 01:32:42]

lgtm

[danakj, 2016-03-17 18:42:25]

The CQ bit was checked by danakj@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-03-17 18:43:07]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1813603003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1813603003/1

[commit-bot: I haz the power, 2016-03-17 18:48:49]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-03-17 18:48:50]

Dry run: This issue passed the CQ dry run.

[Justin Novosad, 2016-03-17 18:52:13]

On 2016/03/17 18:43:07, commit-bot: I haz the power wrote:
> Dry run: CQ is trying da patch. Follow status at
>  https://chromium-cq-status.appspot.com/patch-status/1813603003/1
> View timeline at
>  https://chromium-cq-status.appspot.com/patch-timeline/1813603003/1

lgtm.

[danakj, 2016-03-17 18:52:52]

The CQ bit was checked by danakj@chromium.org

[commit-bot: I haz the power, 2016-03-17 18:53:27]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1813603003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1813603003/1

[commit-bot: I haz the power, 2016-03-17 19:02:51]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-03-17 19:04:00]

Description was changed from

==========
Remove nullchecks for the provider's context.

If the provider is not null, it will have a context that is not null.
The provider is a WebGraphicsContext3DProviderImpl, which is given
a ContextProviderWebContext.

The ContextProviderWebContext is a ContextProviderCommandBuffer, the
factory for which returns a null provider if the underlying context
is null.

Further, the provider comes from RenderThreadImpl's
SharedMainThreadContextProvider(), which will return null if
the provider is null, or if the provider fails to initialize its
GL context.

R=junov@chromium.org, kbr@chromium.org
BUG=584497
==========

to

==========
Remove nullchecks for the provider's context.

If the provider is not null, it will have a context that is not null.
The provider is a WebGraphicsContext3DProviderImpl, which is given
a ContextProviderWebContext.

The ContextProviderWebContext is a ContextProviderCommandBuffer, the
factory for which returns a null provider if the underlying context
is null.

Further, the provider comes from RenderThreadImpl's
SharedMainThreadContextProvider(), which will return null if
the provider is null, or if the provider fails to initialize its
GL context.

R=junov@chromium.org, kbr@chromium.org
BUG=584497

Committed: https://crrev.com/0b5fbe3c7b257fde5861ad986ec77b2c9f6c23c1
Cr-Commit-Position: refs/heads/master@{#381765}
==========

[commit-bot: I haz the power, 2016-03-17 19:04:01]

Patchset 1 (id:??) landed as
https://crrev.com/0b5fbe3c7b257fde5861ad986ec77b2c9f6c23c1
Cr-Commit-Position: refs/heads/master@{#381765}