Fix a bunch of IWYU violators that don't include scoped_ptr.h

remoting/signaling/xmpp_stream_parser.h

 // Copyright 2015 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.
 
 #ifndef REMOTING_SIGNALING_XMPP_STREAM_PARSER_H_
 #define REMOTING_SIGNALING_XMPP_STREAM_PARSER_H_
 
 #include <string>
 
 #include "base/callback.h"
 #include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
 
 namespace buzz {
 class XmlElement;
 }  // namespace buzz
 
 namespace remoting {
 
 // XmppStreamParser is used to parse XMPP stream. Data is fed to the parser
 // using appendData() method and it calls |on_stanza_callback\ and
 // |on_error_callback| specified using SetCallbacks().
@@ skipping 14 matching lines @@
   class Core;
 
   scoped_ptr<Core> core_;
 
   DISALLOW_COPY_AND_ASSIGN(XmppStreamParser);
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_SIGNALING_XMPP_STREAM_PARSER_H_