Implement Main Thread RAF Aligned Input

content/renderer/input/input_handler_manager.h

Index: content/renderer/input/input_handler_manager.h
diff --git a/content/renderer/input/input_handler_manager.h b/content/renderer/input/input_handler_manager.h
index 060f7c58caf13a371144b179e09b88a4a65ce25c..f9313666d731f6fbba8af2a00e3cb0cc942bef94 100644
--- a/content/renderer/input/input_handler_manager.h
+++ b/content/renderer/input/input_handler_manager.h
@@ -41,7 +41,6 @@ namespace content {
 class InputHandlerWrapper;
 class SynchronousInputHandlerProxyClient;
 class InputHandlerManagerClient;
-struct DidOverscrollParams;
 
 // InputHandlerManager class manages InputHandlerProxy instances for
 // the WebViews in this renderer.
@@ -75,6 +74,7 @@ class CONTENT_EXPORT InputHandlerManager {
   void NotifyInputEventHandledOnMainThread(int routing_id,
                                            blink::WebInputEvent::Type,
                                            InputEventAckState);
+  void ProcessRafAlignedInputOnMainThread(int routing_id);
 
   // Callback only from the compositor's thread.
   void RemoveInputHandler(int routing_id);
@@ -95,6 +95,9 @@ class CONTENT_EXPORT InputHandlerManager {
   // Called from the compositor's thread.
   void DidAnimateForInput();
 
+  // Called from the compositor's thread.
+  void NeedsMainFrame(int routing_id);
+
  private:
   // Called from the compositor's thread.
   void AddInputHandlerOnCompositorThread(