Merge 125577 - [chromium] race between CCLayerTreeHostImpl::releaseContentsTextures and CCThreadPro…

Merge 125577 - [chromium] race between CCLayerTreeHostImpl::releaseContentsTextures and CCThreadProxy::beginFrameCompleteOnImplThread
https://bugs.webkit.org/show_bug.cgi?id=93684

Reviewed by James Robinson.

This keeps track of whether we're between the beginFrame post and the
commit when releaseContentsTextures comes, and if that is the case, we
prune the texture uploads, keep the "textures purged" flag on and kick a
new commit.

Added CCLayerTreeHostTestEvictTextures test.

* platform/graphics/chromium/cc/CCLayerTreeHostImpl.cpp:
(WebCore::CCLayerTreeHostImpl::CCLayerTreeHostImpl):
(WebCore::CCLayerTreeHostImpl::beginFramePosted):
(WebCore):
(WebCore::CCLayerTreeHostImpl::commitComplete):
(WebCore::CCLayerTreeHostImpl::canDraw):
(WebCore::CCLayerTreeHostImpl::releaseContentsTextures):
* platform/graphics/chromium/cc/CCLayerTreeHostImpl.h:
(CCLayerTreeHostImpl):
(WebCore::CCLayerTreeHostImpl::contentsTexturesPurged):
(WebCore::CCLayerTreeHostImpl::contentsTexturesWerePurgedSinceLastBeginFrame):
* platform/graphics/chromium/cc/CCSingleThreadProxy.cpp:
(WebCore::CCSingleThreadProxy::stop):
(WebCore::CCSingleThreadProxy::commitAndComposite):
* platform/graphics/chromium/cc/CCTextureUpdateController.h:
(CCTextureUpdateController):
* platform/graphics/chromium/cc/CCTextureUpdateQueue.cpp:
(WebCore::CCTextureUpdateQueue::clearUploads):
(WebCore):
* platform/graphics/chromium/cc/CCTextureUpdateQueue.h:
(CCTextureUpdateQueue):
* platform/graphics/chromium/cc/CCThreadProxy.cpp:
(WebCore::CCThreadProxy::scheduledActionBeginFrame):
(WebCore::CCThreadProxy::beginFrameCompleteOnImplThread):
(WebCore::CCThreadProxy::layerTreeHostClosedOnImplThread):


TBR=piman@chromium.org
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=125699