Move IDMap back to base/ where it is needed.

chrome/common/db_message_filter.h

 // Copyright (c) 2009 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 CHROME_COMMON_DB_MESSAGE_FILTER_H_
 #define CHROME_COMMON_DB_MESSAGE_FILTER_H_
 
+#include "base/id_map.h"
 #include "base/scoped_ptr.h"
 #include "base/waitable_event.h"
-#include "chrome/common/id_map.h"
 #include "ipc/ipc_channel_proxy.h"
 
 class Lock;
 class MessageLoop;
 
 namespace base {
 class AtomicSequenceNumber;
 }
 
 namespace IPC {
@@ skipping 107 matching lines @@
   scoped_ptr<IDMap<DBMessageState> > messages_awaiting_replies_;
 
   // A thread-safe unique number generator
   scoped_ptr<base::AtomicSequenceNumber> unique_id_generator_;
 
   // The singleton
   static DBMessageFilter* instance_;
 };
 
 #endif // CHROME_COMMON_DB_MESSAGE_FILTER_H_