Let the browser know the end of fling

content/browser/android/in_process/synchronous_input_event_filter.cc

Index: content/browser/android/in_process/synchronous_input_event_filter.cc
diff --git a/content/browser/android/in_process/synchronous_input_event_filter.cc b/content/browser/android/in_process/synchronous_input_event_filter.cc
index b8ba0ea335274a37af721a590f275fed9031b1d0..b6404d6679d909e7dc3a8df5d08836cf12a4e1ab 100644
--- a/content/browser/android/in_process/synchronous_input_event_filter.cc
+++ b/content/browser/android/in_process/synchronous_input_event_filter.cc
@@ -76,4 +76,13 @@ void SynchronousInputEventFilter::DidOverscroll(
     compositor->DidOverscroll(params);
 }
 
+void SynchronousInputEventFilter::DidStopFlinging(int routing_id) {
+  // The SynchronusCompositorImpl can be NULL if the WebContents that it's
+  // bound to has already been deleted.
+  SynchronousCompositorImpl* compositor =
+      SynchronousCompositorImpl::FromRoutingID(routing_id);
+  if (compositor)
+    compositor->DidStopFlinging();
+}
+
 }  // namespace content