Provided batched input delivery with a BufferedInputRouter

content/browser/renderer_host/input/input_router.h

Index: content/browser/renderer_host/input/input_router.h
diff --git a/content/browser/renderer_host/input/input_router.h b/content/browser/renderer_host/input/input_router.h
index 2d8a4c6dd5d668b43008e61dfaddece56d028810..cf59e1498cbde188a151d87f5bc44292d469d2fe 100644
--- a/content/browser/renderer_host/input/input_router.h
+++ b/content/browser/renderer_host/input/input_router.h
@@ -24,6 +24,10 @@ class InputRouter : public IPC::Listener {
  public:
   virtual ~InputRouter() {}
 
+  // Should be called only in response to |SetNeedsFlush| requests made via
+  // the |InputRouterClient|.
+  virtual void Flush() = 0;
+
   // Send and take ownership of the the given InputMsg_*. This should be used
   // only for event types not associated with a WebInputEvent.  Returns true on
   // success and false otherwise.