Initial pass at integrating Differ into the chromoting host code....

remoting/host/capturer_fake_ascii.h

 // Copyright (c) 2010 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 REMOTING_HOST_CAPTURER_FAKE_ASCII_H_
 #define REMOTING_HOST_CAPTURER_FAKE_ASCII_H_
 
 #include "base/scoped_ptr.h"
 #include "remoting/host/capturer.h"
 
 namespace remoting {
 
 // A CapturerFakeAscii always outputs an image of 64x48 ASCII characters.
 // This image is artificially generated for testing purpose.
 //
 // CapturerFakeAscii is doubled buffered as required by Capturer. See
 // remoting/host/capturer.h.
 class CapturerFakeAscii : public Capturer {
  public:
   CapturerFakeAscii();
   virtual ~CapturerFakeAscii();
 
-  virtual void CaptureRects(const RectVector& rects,
-                            CaptureCompletedCallback* callback);
   virtual void ScreenConfigurationChanged();
 
  private:
+  virtual void CalculateInvalidRects();
+  virtual void CaptureRects(const InvalidRects& rects,
+                            CaptureCompletedCallback* callback);
+
   // Generates an image in the front buffer.
   void GenerateImage();
 
   // We have two buffers for the screen images as required by Capturer.
   scoped_array<uint8> buffers_[kNumBuffers];
 
   DISALLOW_COPY_AND_ASSIGN(CapturerFakeAscii);
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_HOST_CAPTURER_FAKE_ASCII_H_