Don't depend on MessageLoopProxy in remoting protocol code.

remoting/protocol/video_reader.h

Index: remoting/protocol/video_reader.h
diff --git a/remoting/protocol/video_reader.h b/remoting/protocol/video_reader.h
index d327f66dabfc13ac03860db21cfc1d22a925a9a9..e3ad586c9ed0fd8365b6bceafe5cb1ef0575f283 100644
--- a/remoting/protocol/video_reader.h
+++ b/remoting/protocol/video_reader.h
@@ -12,10 +12,6 @@
 #include "base/callback.h"
 #include "remoting/protocol/video_stub.h"
 
-namespace base {
-class MessageLoopProxy;
-}  // namespace base
-
 namespace remoting {
 namespace protocol {
 
@@ -24,8 +20,7 @@ class SessionConfig;
 
 class VideoReader {
  public:
-  static VideoReader* Create(base::MessageLoopProxy* message_loop,
-                             const SessionConfig& config);
+  static VideoReader* Create(const SessionConfig& config);
 
   // The callback is called when initialization is finished. The
   // parameter is set to true on success.