Remove ContextProvider::IsContextLost.

Remove ContextProvider::IsContextLost.

Use GLES2Interface::GetGraphicsResetStatusKHR() instead now that it
exists.

R=piman@chromium.org
BUG=492447
CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel

Committed: https://crrev.com/6b2828ada942b5fab85bc8e1dbc61e63701693f9
Cr-Commit-Position: refs/heads/master@{#333578}

[piman, 2015-06-09 00:02:43]

lgtm

[danakj, 2015-06-09 00:50:31]

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

[danakj, 2015-06-09 00:50:31]

+sky for mojo and components

[sky, 2015-06-09 13:15:31]

LGTM

[danakj, 2015-06-09 16:51:59]

The CQ bit was checked by danakj@chromium.org

[commit-bot: I haz the power, 2015-06-09 16:52:59]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1168943002/1

[commit-bot: I haz the power, 2015-06-09 17:34:52]

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

[commit-bot: I haz the power, 2015-06-09 17:34:54]

Try jobs failed on following builders:
  linux_android_rel_ng on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_android_r...)

[danakj, 2015-06-09 20:19:21]

The CQ bit was checked by danakj@chromium.org

[danakj, 2015-06-09 20:19:22]

The patchset sent to the CQ was uploaded after l-g-t-m from sky@chromium.org,
piman@chromium.org
Link to the patchset: https://codereview.chromium.org/1168943002/#ps20001
(title: "contextprovider: .")

[danakj, 2015-06-09 20:19:49]

The CQ bit was checked by danakj@chromium.org

[danakj, 2015-06-09 20:19:49]

The patchset sent to the CQ was uploaded after l-g-t-m from sky@chromium.org,
piman@chromium.org
Link to the patchset: https://codereview.chromium.org/1168943002/#ps40001
(title: "contextprovider: .")

[commit-bot: I haz the power, 2015-06-09 20:20:07]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1168943002/40001

[commit-bot: I haz the power, 2015-06-09 20:28:34]

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

[commit-bot: I haz the power, 2015-06-09 20:28:36]

Try jobs failed on following builders:
  chromium_presubmit on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/chromium_presub...)

[danakj, 2015-06-09 20:30:22]

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

[danakj, 2015-06-09 20:30:22]

+boliu for android_webview/

[boliu, 2015-06-09 20:31:09]

lgtm

[danakj, 2015-06-09 20:31:23]

The CQ bit was checked by danakj@chromium.org

[commit-bot: I haz the power, 2015-06-09 20:32:17]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1168943002/40001

[commit-bot: I haz the power, 2015-06-09 21:39:46]

Committed patchset #3 (id:40001)

[commit-bot: I haz the power, 2015-06-09 21:40:35]

Patchset 3 (id:??) landed as
https://crrev.com/6b2828ada942b5fab85bc8e1dbc61e63701693f9
Cr-Commit-Position: refs/heads/master@{#333578}