Implement Main Thread RAF Aligned Input

content/renderer/input/input_handler_manager_client.h

Index: content/renderer/input/input_handler_manager_client.h
diff --git a/content/renderer/input/input_handler_manager_client.h b/content/renderer/input/input_handler_manager_client.h
index a65ad731cbd3b4c69be40d6d4374cae611ed3379..cdc38633eaeabe73c6c05d9519166f8e3db80dc3 100644
--- a/content/renderer/input/input_handler_manager_client.h
+++ b/content/renderer/input/input_handler_manager_client.h
@@ -27,24 +27,18 @@ class SynchronousInputHandlerProxy;
 }
 
 namespace content {
+class InputHandlerManager;
 
 class CONTENT_EXPORT InputHandlerManagerClient {
  public:
   virtual ~InputHandlerManagerClient() {}
 
-  // The Manager will supply a |handler| when bound to the client. This is valid
-  // until the manager shuts down, at which point it supplies a null |handler|.
-  // The client should only makes calls to |handler| on the compositor thread.
-  typedef base::Callback<
-      InputEventAckState(int /*routing_id*/,
-                         const blink::WebInputEvent*,
-                         ui::LatencyInfo* latency_info)> Handler;
-
   // Called from the main thread.
-  virtual void SetBoundHandler(const Handler& handler) = 0;
+  virtual void SetInputHandlerManager(InputHandlerManager*) = 0;
   virtual void NotifyInputEventHandled(int routing_id,
                                        blink::WebInputEvent::Type type,
                                        InputEventAckState ack_result) = 0;
+  virtual void ProcessRafAlignedInput(int routing_id) = 0;
 
   // Called from the compositor thread.
   virtual void RegisterRoutingID(int routing_id) = 0;