[Cast] Repurpose CastInitializationStatus for variable frame size support.

chrome/renderer/media/cast_session_delegate.h

 // Copyright 2013 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 CHROME_RENDERER_MEDIA_CAST_SESSION_DELEGATE_H_
 #define CHROME_RENDERER_MEDIA_CAST_SESSION_DELEGATE_H_
 
 #include <map>
 #include <vector>
 
@@ skipping 68 matching lines @@
                       create_vea_cb,
                   const media::cast::CreateVideoEncodeMemoryCallback&
                       create_video_encode_mem_cb);
 
   void ToggleLogging(bool is_audio, bool enable);
   void GetEventLogsAndReset(bool is_audio,
       const std::string& extra_data, const EventLogsCallback& callback);
   void GetStatsAndReset(bool is_audio, const StatsCallback& callback);
 
  protected:
-  // Callback with the result of the initialization.
-  // If this callback is called with STATUS_INITIALIZED it will report back
-  // to the sinks that it's ready to accept incoming audio / video frames.
-  void InitializationResultCB(
+  // Called to report back operational status changes.  The first time this is
+  // called with STATUS_INITIALIZED will result in running the "frame input
+  // available" callback, to indicate the session is ready to accept incoming
+  // audio/video frames.  If this is called with an error that has halted the
+  // session, the |error_callback| provided to StartXXX() will be run.  This
+  // method may be called multiple times during the session to indicate codec
+  // re-initializations are taking place and/or runtime errors have occurred.
+  void OnOperationalStatusChange(
+      bool is_for_audio,
       const ErrorCallback& error_callback,
-      media::cast::CastInitializationStatus result) const;
+      media::cast::OperationalStatus result);
 
  private:
   void StatusNotificationCB(
       media::cast::CastTransportStatus status);
 
   // Adds logs collected from transport on browser side.
   void LogRawEvents(const std::vector<media::cast::PacketEvent>& packet_events,
                     const std::vector<media::cast::FrameEvent>& frame_events);
 
   base::ThreadChecker thread_checker_;
   scoped_refptr<media::cast::CastEnvironment> cast_environment_;
   scoped_ptr<media::cast::CastSender> cast_sender_;
   scoped_ptr<media::cast::CastTransportSender> cast_transport_;
 
   AudioFrameInputAvailableCallback audio_frame_input_available_callback_;
   VideoFrameInputAvailableCallback video_frame_input_available_callback_;
 
   scoped_ptr<media::cast::RawEventSubscriberBundle> event_subscribers_;
 
   // Proxy to the IO message loop.
   scoped_refptr<base::MessageLoopProxy> io_message_loop_proxy_;
   base::WeakPtrFactory<CastSessionDelegate> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(CastSessionDelegate);
 };
 
 #endif  // CHROME_RENDERER_MEDIA_CAST_SESSION_DELEGATE_H_