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

remoting/base/encoder_zlib.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_BASE_ENCODER_ZLIB_H_
 #define REMOTING_BASE_ENCODER_ZLIB_H_
 
 #include "remoting/base/encoder.h"
 
+#include "gfx/rect.h"
+
 namespace remoting {
 
 class CompressorZlib;
 class UpdateStreamPacket;
 
 // EncoderZlib implements an Encoder using Zlib for compression.
 class EncoderZlib : public Encoder {
  public:
   EncoderZlib();
   EncoderZlib(int packet_size);
 
   virtual ~EncoderZlib() {}
 
   virtual void Encode(scoped_refptr<CaptureData> capture_data,
                       bool key_frame,
                       DataAvailableCallback* data_available_callback);
 
  private:
   // Encode a single dirty rect using compressor.
-  void EncodeRect(CompressorZlib* compressor);
+  void EncodeRect(CompressorZlib* compressor, const gfx::Rect& rect,
+                  size_t rect_index);
 
   // Create a new HostMessage with the right flag and attributes. The message
   // can be used immediately for output of encoding.
-  HostMessage* PrepareMessage(bool new_rect);
+  HostMessage* PrepareMessage(const gfx::Rect* rect);
 
   // Submit |message| to |callback_|.
-  void SubmitMessage(HostMessage* message);
+  void SubmitMessage(HostMessage* message, size_t rect_index);
 
   scoped_refptr<CaptureData> capture_data_;
   scoped_ptr<DataAvailableCallback> callback_;
-  size_t current_rect_;
+  //size_t current_rect_;
   int packet_size_;
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_BASE_ENCODER_ZLIB_H_