Move the remaning files in content\common to the content namespace.

content/common/message_router.h

 // Copyright (c) 2012 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 CONTENT_COMMON_MESSAGE_ROUTER_H_
 #define CONTENT_COMMON_MESSAGE_ROUTER_H_
 
 #include "base/id_map.h"
 #include "ipc/ipc_listener.h"
 #include "ipc/ipc_sender.h"
 
 // The MessageRouter handles all incoming messages sent to it by routing them
 // to the correct listener.  Routing is based on the Message's routing ID.
 // Since routing IDs are typically assigned asynchronously by the browser
 // process, the MessageRouter has the notion of pending IDs for listeners that
 // have not yet been assigned a routing ID.
 //
 // When a message arrives, the routing ID is used to index the set of routes to
 // find a listener.  If a listener is found, then the message is passed to it.
 // Otherwise, the message is ignored if its routing ID is not equal to
 // MSG_ROUTING_CONTROL.
 //
 // The MessageRouter supports the IPC::Sender interface for outgoing messages,
 // but does not define a meaningful implementation of it.  The subclass of
 // MessageRouter is intended to provide that if appropriate.
 //
 // The MessageRouter can be used as a concrete class provided its Send method
 // is not called and it does not receive any control messages.
 
+namespace content {
+
 class MessageRouter : public IPC::Listener, public IPC::Sender {
  public:
   MessageRouter();
   virtual ~MessageRouter();
 
   // Implemented by subclasses to handle control messages
   virtual bool OnControlMessageReceived(const IPC::Message& msg);
 
   // IPC::Listener implementation:
   virtual bool OnMessageReceived(const IPC::Message& msg) OVERRIDE;
@@ skipping 12 matching lines @@
 
   IPC::Listener* ResolveRoute(int32 routing_id);
 
  private:
   // A list of all listeners with assigned routing IDs.
   IDMap<IPC::Listener> routes_;
 
   DISALLOW_COPY_AND_ASSIGN(MessageRouter);
 };
 
+}  // namespace content
+
 #endif  // CONTENT_COMMON_MESSAGE_ROUTER_H_