Separate RenderView from RenderWidget, part 4: Painting calls in the delegate.

content/renderer/render_widget.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_RENDERER_RENDER_WIDGET_H_
 #define CONTENT_RENDERER_RENDER_WIDGET_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 481 matching lines @@
   bool SetDeviceColorProfile(const std::vector<char>& color_profile);
 
   virtual void OnOrientationChange();
 
   // Override points to notify derived classes that a paint has happened.
   // DidInitiatePaint happens when that has completed, and subsequent rendering
   // won't affect the painted content. DidFlushPaint happens once we've received
   // the ACK that the screen has been updated. For a given paint operation,
   // these overrides will always be called in the order DidInitiatePaint,
   // DidFlushPaint.
-  virtual void DidInitiatePaint() {}
-  virtual void DidFlushPaint() {}
+  virtual void DidInitiatePaint();
+  virtual void DidFlushPaint();
 
   virtual GURL GetURLForGraphicsContext3D();
 
   // Gets the scroll offset of this widget, if this widget has a notion of
   // scroll offset.
   virtual gfx::Vector2d GetScrollOffset();
 
   // Sets the "hidden" state of this widget.  All accesses to is_hidden_ should
   // use this method so that we can properly inform the RenderThread of our
   // state.
@@ skipping 269 matching lines @@
  private:
   // When emulated, this returns original device scale factor.
   float GetOriginalDeviceScaleFactor() const;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidget);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDER_WIDGET_H_