Add VideoPacket struct for video packets. Refactor Decode interface to use it.

remoting/client/rectangle_update_decoder.h

Index: remoting/client/rectangle_update_decoder.h
diff --git a/remoting/client/rectangle_update_decoder.h b/remoting/client/rectangle_update_decoder.h
index e6c344e48a763cb58558866a1738a84390a46acb..83617d230e72fd03e6eb570d4866748244f8c6d5 100644
--- a/remoting/client/rectangle_update_decoder.h
+++ b/remoting/client/rectangle_update_decoder.h
@@ -7,13 +7,14 @@
 
 #include "base/scoped_ptr.h"
 #include "base/task.h"
+#include "gfx/size.h"
 #include "media/base/video_frame.h"
-#include "remoting/base/decoder.h"  // For UpdatedRects
 
 class MessageLoop;
 
 namespace remoting {
 
+class ChromotocolConfig;
 class Decoder;
 class FrameConsumer;
 class VideoPacketFormat;
@@ -21,12 +22,16 @@ class VideoPacket;
 
 // TODO(ajwong): Re-examine this API, especially with regards to how error
 // conditions on each step are reported.  Should they be CHECKs? Logs? Other?
+// TODO(sergeyu): Rename this class.
 class RectangleUpdateDecoder {
  public:
   RectangleUpdateDecoder(MessageLoop* message_loop,
                          FrameConsumer* consumer);
   ~RectangleUpdateDecoder();
 
+  // Initializes decoder with the infromation from the protocol config.
+  void Initialize(const ChromotocolConfig* config);
+
   // Decodes the contents of |packet| calling OnPartialFrameOutput() in the
   // regsitered as data is avaialable. DecodePacket may keep a reference to
   // |packet| so the |packet| must remain alive and valid until |done| is
@@ -34,21 +39,20 @@ class RectangleUpdateDecoder {
   //
   // TODO(ajwong): Should packet be a const pointer to make the lifetime
   // more clear?
-  void DecodePacket(const VideoPacket& packet, Task* done);
+  void DecodePacket(const VideoPacket* packet, Task* done);
 
  private:
-  static bool IsValidPacket(const VideoPacket& packet);
-
-  void InitializeDecoder(const VideoPacketFormat& format, Task* done);
+  void InitializeDecoder(Task* done);
 
-  void ProcessPacketData(const VideoPacket& packet, Task* done);
+  void ProcessPacketData(const VideoPacket* packet, Task* done);
 
   // Pointers to infrastructure objects.  Not owned.
   MessageLoop* message_loop_;
   FrameConsumer* consumer_;
 
+  gfx::Size screen_size_;
+
   scoped_ptr<Decoder> decoder_;
-  UpdatedRects updated_rects_;
 
   // Framebuffer for the decoder.
   scoped_refptr<media::VideoFrame> frame_;