Be able to build cast_unittest and related targets in Chrome tree

media/cast/cast_sender_impl.h

Index: media/cast/cast_sender_impl.h
diff --git a/media/cast/cast_sender_impl.h b/media/cast/cast_sender_impl.h
index eb19caa247b027c7af7a0b207a7bef1fd4061b80..afbd40d02dd9980bed9a3389e7914b9bb553ce1f 100644
--- a/media/cast/cast_sender_impl.h
+++ b/media/cast/cast_sender_impl.h
@@ -32,13 +32,8 @@ class CastSenderImpl : public CastSender {
 
   virtual ~CastSenderImpl();
 
-  virtual scoped_refptr<FrameInput> frame_input() OVERRIDE  {
-    return frame_input_;
-  }
-
-  virtual scoped_refptr<PacketReceiver> packet_receiver() OVERRIDE {
-    return packet_receiver_;
-  }
+  virtual scoped_refptr<FrameInput> frame_input() OVERRIDE;
+  virtual scoped_refptr<PacketReceiver> packet_receiver() OVERRIDE;
 
  private:
   PacedSender pacer_;