Attempt to linearize the scroll deltas created in RenderWidgetHostViewBase

content/public/browser/render_widget_host.h

 // Copyright (c) 2012 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_PUBLIC_BROWSER_RENDER_WIDGET_HOST_H_
 #define CONTENT_PUBLIC_BROWSER_RENDER_WIDGET_HOST_H_
 
 #include "base/callback.h"
 #include "content/common/content_export.h"
 #include "content/public/browser/keyboard_listener.h"
@@ skipping 248 matching lines @@
   // Access to the implementation's IPC::Listener::OnMessageReceived. Intended
   // only for test code.
 
   // Add a keyboard listener that can handle key presses without requiring
   // focus.
   virtual void AddKeyboardListener(KeyboardListener* listener) = 0;
 
   // Remove a keyboard listener.
   virtual void RemoveKeyboardListener(KeyboardListener* listener) = 0;
 
+  virtual int SyntheticScrollMessageInterval() const = 0;

[jam, 2012/12/02 23:47:39]

since this is just called from inside content (i.e. not by embedders), no need
to have it on the public interface. add it on RenderWidgetHostImpl and cast to
the impl when you need to call it

+
  protected:
   friend class RenderWidgetHostImpl;
 
   // Retrieves the implementation class.  Intended only for code
   // within content/.  This method is necessary because
   // RenderWidgetHost is the root of a diamond inheritance pattern, so
   // subclasses inherit it virtually, which removes our ability to
   // static_cast to the subclass.
   virtual RenderWidgetHostImpl* AsRenderWidgetHostImpl() = 0;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_RENDER_WIDGET_HOST_H_