Cleanup: Remove unneeded forward declarations from remoting.

remoting/jingle_glue/xmpp_proxy.h

 // Copyright (c) 2011 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.
 
 // The XmppProxy is a shim interface that allows a class from layers above
 // the protocol to insert custom logic for dispatching the XMPP requests
 // necessary for creating a jingle connection.
 //
 // The primary motivator for this is to allow libjingle to be sandboxed in the
 // client by proxying the XMPP requests up through javascript into a
 // javascript-based XMPP connection back into the GoogleTalk network.  It's
 // essentially a clean hack.
 
 #ifndef REMOTING_JINGLE_GLUE_XMPP_PROXY_H_
 #define REMOTING_JINGLE_GLUE_XMPP_PROXY_H_
 
 #include <string>
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 
-class MessageLoop;
-
 namespace remoting {
 
 class XmppProxy : public base::RefCountedThreadSafe<XmppProxy> {
  public:
   XmppProxy() {}
 
   class ResponseCallback : public base::SupportsWeakPtr<ResponseCallback> {
    public:
     ResponseCallback() {}
     virtual ~ResponseCallback() {}
@@ skipping 13 matching lines @@
  protected:
   friend class base::RefCountedThreadSafe<XmppProxy>;
   virtual ~XmppProxy() {}
 
  private:
   DISALLOW_COPY_AND_ASSIGN(XmppProxy);
 };
 
 }  // namespace remoting
 
-#endif // REMOTING_JINGLE_GLUE_XMPP_PROXY_H_
+#endif  // REMOTING_JINGLE_GLUE_XMPP_PROXY_H_