[Android] Provide synchronized input flush with BeginFrame

content/browser/renderer_host/render_widget_host_view_base.cc

Index: content/browser/renderer_host/render_widget_host_view_base.cc
diff --git a/content/browser/renderer_host/render_widget_host_view_base.cc b/content/browser/renderer_host/render_widget_host_view_base.cc
index 57181031f223b8966f420c8c83f515d25360c349..320e3e1757e4b7ed4dbf79341cd65bf17eaccf3c 100644
--- a/content/browser/renderer_host/render_widget_host_view_base.cc
+++ b/content/browser/renderer_host/render_widget_host_view_base.cc
@@ -456,6 +456,14 @@ InputEventAckState RenderWidgetHostViewBase::FilterInputEvent(
   return INPUT_EVENT_ACK_STATE_NOT_CONSUMED;
 }
 
+void RenderWidgetHostViewBase::OnDidFlushInput() {
+  // The notification can safely be ignored by most implementations.

[brianderson, 2013/09/13 21:49:27]

Can you explain why?

[jdduke (slow), 2013/09/16 15:16:04]

In the comment? Or to you? :) 

This was previously used when we blocked the "BeginFrame" signal during a flush,
but we don't do that any longer, so it's actually not even used by Android.  I
was wondering if I should rip it out entirely, but I think it could be useful.

+}
+
+void RenderWidgetHostViewBase::OnSetNeedsFlushInput() {
+  NOTIMPLEMENTED();
+}
+
 void RenderWidgetHostViewBase::GestureEventAck(int gesture_event_type,
                                                InputEventAckState ack_result) {}