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

blimp/net/connection_handler.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 BLIMP_NET_CONNECTION_HANDLER_H_
 #define BLIMP_NET_CONNECTION_HANDLER_H_
 
+#include "base/memory/scoped_ptr.h"
+
 namespace blimp {
 
 class BlimpConnection;
 
 // Interface for objects that can take possession of BlimpConnections.
 class ConnectionHandler {
  public:
   virtual ~ConnectionHandler() {}
 
   virtual void HandleConnection(scoped_ptr<BlimpConnection> connection) = 0;
 };
 
 }  // namespace blimp
 
 #endif  // BLIMP_NET_CONNECTION_HANDLER_H_