Remove WebScheduler::shutdown() which is no longer needed.

Remove WebScheduler::shutdown() which is no longer needed.

The scheduler is now shutdown as part of the renderer_main shutdown sequence
before Blink is shutdown, so remove the shutdown method.

BUG=467369
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=192047

[rmcilroy, 2015-03-16 18:25:17]

rmcilroy@chromium.org changed reviewers:
+ jochen@chromium.org, skyostil@chromium.org

[rmcilroy, 2015-03-16 18:25:18]

Jochen: PTAL, thanks.

Sami: FYI and comments welcome.

[Sami, 2015-03-16 19:11:15]

lgtm.

[jochen (gone - plz use gerrit), 2015-03-17 10:31:03]

lgtm

[rmcilroy, 2015-03-17 13:31:37]

The CQ bit was checked by rmcilroy@chromium.org

[commit-bot: I haz the power, 2015-03-17 13:31:50]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1011693003/1

[commit-bot: I haz the power, 2015-03-17 13:50:02]

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

[commit-bot: I haz the power, 2015-03-17 13:50:03]

Try jobs failed on following builders:
  android_blink_compile_rel on tryserver.blink (JOB_FAILED,
http://build.chromium.org/p/tryserver.blink/builders/android_blink_compile_re...)

[rmcilroy, 2015-03-17 21:53:19]

The CQ bit was checked by rmcilroy@chromium.org

[rmcilroy, 2015-03-17 21:53:20]

The patchset sent to the CQ was uploaded after l-g-t-m from jochen@chromium.org,
skyostil@chromium.org
Link to the patchset: https://codereview.chromium.org/1011693003/#ps20001
(title: "Fix SchedulerTest")

[commit-bot: I haz the power, 2015-03-17 21:54:02]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1011693003/20001

[commit-bot: I haz the power, 2015-03-17 23:36:20]

Committed patchset #2 (id:20001) as
https://src.chromium.org/viewvc/blink?view=rev&revision=192047