Revert 226305 "Fix code style and gyp files in cast to build cas..."

media/cast/audio_sender/audio_sender.cc

Index: media/cast/audio_sender/audio_sender.cc
===================================================================
--- media/cast/audio_sender/audio_sender.cc	(revision 226456)
+++ media/cast/audio_sender/audio_sender.cc	(working copy)
@@ -22,6 +22,10 @@
       : audio_sender_(audio_sender) {
   }
 
+  virtual void OnReceivedSendReportRequest() OVERRIDE {
+    DCHECK(false) << "Invalid callback";
+  }
+
   virtual void OnReceivedReportBlock(
       const RtcpReportBlock& report_block) OVERRIDE {
     DCHECK(false) << "Invalid callback";