[Cast] Repurpose CastInitializationStatus for variable frame size support.

media/cast/sender/frame_sender.h

 // Copyright 2014 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.
 //
 // This is the base class for an object that send frames to a receiver.
 // TODO(hclam): Refactor such that there is no separate AudioSender vs.
 // VideoSender, and the functionality of both is rolled into this class.
 
 #ifndef MEDIA_CAST_SENDER_FRAME_SENDER_H_
 #define MEDIA_CAST_SENDER_FRAME_SENDER_H_
@@ skipping 132 matching lines @@
   // acknowledged.  Logic throughout AudioSender assumes this can safely
   // wrap-around.  This member is invalid until |!last_send_time_.is_null()|.
   uint32 latest_acked_frame_id_;
 
   // Counts the number of duplicate ACK that are being received.  When this
   // number reaches a threshold, the sender will take this as a sign that the
   // receiver hasn't yet received the first packet of the next frame.  In this
   // case, VideoSender will trigger a re-send of the next frame.
   int duplicate_ack_counter_;
 
-  // If this sender is ready for use, this is STATUS_AUDIO_INITIALIZED or
-  // STATUS_VIDEO_INITIALIZED.
-  CastInitializationStatus cast_initialization_status_;
-
   // This object controls how we change the bitrate to make sure the
   // buffer doesn't overflow.
   scoped_ptr<CongestionControl> congestion_control_;
 
   // The most recently measured round trip time.
   base::TimeDelta current_round_trip_time_;
 
  private:
   // Returns the maximum media duration currently allowed in-flight.  This
   // fluctuates in response to the currently-measured network latency.
@@ skipping 13 matching lines @@
   // NOTE: Weak pointers must be invalidated before all other member variables.
   base::WeakPtrFactory<FrameSender> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(FrameSender);
 };
 
 }  // namespace cast
 }  // namespace media
 
 #endif  // MEDIA_CAST_SENDER_FRAME_SENDER_H_