Send a message from WebViewImpl to the compositor to inform about end of flings
https://bugs.webkit.org/show_bug.cgi?id=104947

Patch by Yusuf Ozuysal <yusufo@google.com> on 2012-12-14
Reviewed by James Robinson.

Whenever we have a fling animation finished on cancelled on main thread this sends
a message that will be relayed to the compositor input handler. Then the input handler
keeps track of main thread fling with a boolean and doesn't send flingCancels
unnecessarily

Source/Platform:

* chromium/public/WebInputHandler.h:
(WebInputHandler):
* chromium/public/WebLayerTreeView.h:
(WebLayerTreeView):
(WebKit::WebLayerTreeView::mainThreadHasStoppedFlinging):

Source/WebKit/chromium:

* src/WebCompositorInputHandlerImpl.cpp:
(WebKit::WebCompositorInputHandlerImpl::WebCompositorInputHandlerImpl):
(WebKit::WebCompositorInputHandlerImpl::handleInputEventInternal):
(WebKit::WebCompositorInputHandlerImpl::handleGestureFling):
(WebKit::WebCompositorInputHandlerImpl::mainThreadHasStoppedFlinging):
(WebKit):
* src/WebCompositorInputHandlerImpl.h:
(WebCompositorInputHandlerImpl):
* src/WebViewImpl.cpp:
(WebKit::WebViewImpl::handleGestureEvent):
(WebKit::WebViewImpl::handleKeyEvent):
(WebKit::WebViewImpl::updateAnimations):
(WebKit::WebViewImpl::didCommitLoad):

git-svn-id: https://svn.webkit.org/repository/webkit/trunk/Source/Platform/chromium/public@137765 268f45cc-cd09-0410-ab3c-d52691b4dbfc