Cleanup: Remove forward declarations in various directories.

remoting/protocol/connection_to_client.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.
 
 #ifndef REMOTING_PROTOCOL_CONNECTION_TO_CLIENT_H_
 #define REMOTING_PROTOCOL_CONNECTION_TO_CLIENT_H_
 
 #include <deque>
 #include <vector>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/synchronization/lock.h"
 #include "base/threading/non_thread_safe.h"
 #include "remoting/protocol/session.h"
 #include "remoting/protocol/video_writer.h"
 
-namespace base {
-class MessageLoopProxy;
-}  // namespace base
-
 namespace remoting {
 namespace protocol {
 
 class ClientControlSender;
 class ClientStub;
 class HostStub;
 class InputStub;
 class HostMessageDispatcher;
 
 // This class represents a remote viewer connection to the chromoting
@@ skipping 14 matching lines @@
     // Called when the network connection has failed.
     virtual void OnConnectionFailed(ConnectionToClient* connection) = 0;
 
     // Called when sequence number is updated.
     virtual void OnSequenceNumberUpdated(ConnectionToClient* connection,
                                          int64 sequence_number) = 0;
   };
 
   // Constructs a ConnectionToClient object for the |session|. Takes
   // ownership of |session|.
-  ConnectionToClient(Session* session);
+  explicit ConnectionToClient(Session* session);
   virtual ~ConnectionToClient();
 
   // Set |event_handler| for connection events. |event_handler| is
   // guaranteed to be used only on the network thread. Must be called
   // once when this object is created.
   void SetEventHandler(EventHandler* event_handler);
 
   // Returns the connection in use.
   virtual Session* session();
 
@@ skipping 50 matching lines @@
   bool input_connected_;
   bool video_connected_;
 
   DISALLOW_COPY_AND_ASSIGN(ConnectionToClient);
 };
 
 }  // namespace protocol
 }  // namespace remoting
 
 #endif  // REMOTING_PROTOCOL_CONNECTION_TO_CLIENT_H_