Implement Main Thread RAF Aligned Input

content/renderer/input/input_handler_wrapper.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_RENDERER_INPUT_INPUT_HANDLER_WRAPPER_H_
 #define CONTENT_RENDERER_INPUT_INPUT_HANDLER_WRAPPER_H_
 
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "base/single_thread_task_runner.h"
@@ skipping 18 matching lines @@
       const base::WeakPtr<cc::InputHandler>& input_handler,
       const base::WeakPtr<RenderViewImpl>& render_view_impl,
       bool enable_smooth_scrolling);
   ~InputHandlerWrapper() override;
 
   int routing_id() const { return routing_id_; }
   ui::InputHandlerProxy* input_handler_proxy() {
     return &input_handler_proxy_;
   }
 
+  void NeedsMainFrame();
+
   // InputHandlerProxyClient implementation.
   void WillShutdown() override;
   void TransferActiveWheelFlingAnimation(
       const blink::WebActiveWheelFlingParameters& params) override;
   blink::WebGestureCurve* CreateFlingAnimationCurve(
       blink::WebGestureDevice deviceSource,
       const blink::WebFloatPoint& velocity,
       const blink::WebSize& cumulativeScroll) override;
   void DidOverscroll(
         const gfx::Vector2dF& accumulated_overscroll,
@@ skipping 12 matching lines @@
 
   // Can only be accessed on the main thread.
   base::WeakPtr<RenderViewImpl> render_view_impl_;
 
   DISALLOW_COPY_AND_ASSIGN(InputHandlerWrapper);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_INPUT_INPUT_HANDLER_WRAPPER_H_