commit eb7ab820fa77af56e63697a296d2ea54698d39c3
author yhirano <yhirano@chromium.org> Wed Apr 27 12:28:16 2016
committer Commit bot <commit-bot@chromium.org> Wed Apr 27 12:29:25 2016
tree 86119985ae43a2230163b1b21fd1ff8185139094
parent 5a7f81ba1a577e9321a709c4ee2646f50dbef75c

[CompositorWorker] Do not create WorkerBackingThread in shutdown sequence

Previously CompositorWorkerThread::clearSharedBackingThread() instantiated
a WebThreadSupportingGC just before destructing it if no one had used
a CompositorWorkerThread. This change removes the function, because the
thread is shutdown when the last compositor worker thread is gone and
leaving CompositorWorkerThread::m_thread is harmless.

BUG=575532

Review URL: https://codereview.chromium.org/1897143002

Cr-Commit-Position: refs/heads/master@{#390050}