Remove implicit conversions from scoped_refptr to T* in media/

media/cast/cast_environment.h

Index: media/cast/cast_environment.h
diff --git a/media/cast/cast_environment.h b/media/cast/cast_environment.h
index 1549747ee2237631256bf870ea3e382254e4fca3..d3c9474fa3f54eff7704699d79715dbf57a3c53c 100644
--- a/media/cast/cast_environment.h
+++ b/media/cast/cast_environment.h
@@ -64,13 +64,9 @@ class CastEnvironment : public base::RefCountedThreadSafe<CastEnvironment> {
   scoped_refptr<base::SingleThreadTaskRunner> GetTaskRunner(
       ThreadId identifier) const;
 
-  bool HasAudioThread() {
-    return audio_thread_proxy_ ? true : false;
-  }
+  bool HasAudioThread() { return audio_thread_proxy_.get() ? true : false; }
 
-  bool HasVideoThread() {
-    return video_thread_proxy_ ? true : false;
-  }
+  bool HasVideoThread() { return video_thread_proxy_.get() ? true : false; }
 
  protected:
   virtual ~CastEnvironment();