Let the browser know the end of fling

content/browser/renderer_host/render_widget_host_impl.cc

Index: content/browser/renderer_host/render_widget_host_impl.cc
diff --git a/content/browser/renderer_host/render_widget_host_impl.cc b/content/browser/renderer_host/render_widget_host_impl.cc
index a5894b284dd1ba0e14fcb0998797598ec3eb1b0b..4d23580b3db36706cfe2e0e34f0817a7adbf664e 100644
--- a/content/browser/renderer_host/render_widget_host_impl.cc
+++ b/content/browser/renderer_host/render_widget_host_impl.cc
@@ -475,6 +475,8 @@ bool RenderWidgetHostImpl::OnMessageReceived(const IPC::Message &msg) {
     IPC_MESSAGE_HANDLER_GENERIC(ViewHostMsg_SwapCompositorFrame,
                                 msg_is_ok = OnSwapCompositorFrame(msg))
     IPC_MESSAGE_HANDLER(ViewHostMsg_DidOverscroll, OnOverscrolled)
+    IPC_MESSAGE_HANDLER(ViewHostMsg_DidStartFlinging, OnFlingingStarted)
+    IPC_MESSAGE_HANDLER(ViewHostMsg_DidStopFlinging, OnFlingingStopped)
     IPC_MESSAGE_HANDLER(ViewHostMsg_UpdateRect, OnUpdateRect)
     IPC_MESSAGE_HANDLER(ViewHostMsg_UpdateIsDelayed, OnUpdateIsDelayed)
     IPC_MESSAGE_HANDLER(ViewHostMsg_Focus, OnFocus)
@@ -1534,6 +1536,16 @@ void RenderWidgetHostImpl::OnOverscrolled(
     view_->OnOverscrolled(accumulated_overscroll, current_fling_velocity);
 }
 
+void RenderWidgetHostImpl::OnFlingingStarted() {
+  if (view_)
+    view_->DidStartFlinging();
+}
+
+void RenderWidgetHostImpl::OnFlingingStopped() {
+  if (view_)
+    view_->DidStopFlinging();
+}
+
 void RenderWidgetHostImpl::OnUpdateRect(
     const ViewHostMsg_UpdateRect_Params& params) {
   TRACE_EVENT0("renderer_host", "RenderWidgetHostImpl::OnUpdateRect");