Clean up viewport scrolling methods in CC

cc/input/input_handler.h

 // Copyright 2011 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 CC_INPUT_INPUT_HANDLER_H_
 #define CC_INPUT_INPUT_HANDLER_H_
 
 #include <memory>
 
 #include "base/macros.h"
@@ skipping 159 matching lines @@
       const gfx::ScrollOffset& root_offset) = 0;
 
   virtual void PinchGestureBegin() = 0;
   virtual void PinchGestureUpdate(float magnify_delta,
                                   const gfx::Point& anchor) = 0;
   virtual void PinchGestureEnd() = 0;
 
   // Request another callback to InputHandlerClient::Animate().
   virtual void SetNeedsAnimateInput() = 0;
 
-  // Returns true if there is an active scroll on the inner viewport layer.
-  virtual bool IsCurrentlyScrollingInnerViewport() const = 0;
+  // Returns true if there is an active scroll on the viewport.
+  virtual bool IsCurrentlyScrollingViewport() const = 0;
 
   // Whether the layer under |viewport_point| is the currently scrolling layer.
   virtual bool IsCurrentlyScrollingLayerAt(const gfx::Point& viewport_point,
                                            ScrollInputType type) const = 0;
 
   virtual EventListenerProperties GetEventListenerProperties(
       EventListenerClass event_class) const = 0;
 
   // Whether the page should be given the opportunity to suppress scrolling by
   // consuming touch events that started at |viewport_point|.
@@ skipping 19 matching lines @@
   InputHandler() {}
   virtual ~InputHandler() {}
 
  private:
   DISALLOW_COPY_AND_ASSIGN(InputHandler);
 };
 
 }  // namespace cc
 
 #endif  // CC_INPUT_INPUT_HANDLER_H_