Move IDMap from base/ to common/

chrome/common/id_map.h

 // Copyright (c) 2006-2008 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 BASE_ID_MAP_H__
-#define BASE_ID_MAP_H__
+#ifndef CHROME_COMMON_ID_MAP_H_
+#define CHROME_COMMON_ID_MAP_H_
 
 #include "base/basictypes.h"
 #include "base/hash_tables.h"
 #include "base/logging.h"
 
 // This object maintains a list of IDs that can be quickly converted to
 // pointers to objects. It is implemented as a hash table, optimized for
 // relatively small data sets (in the common case, there will be exactly one
 // item in the list).
 //
@@ skipping 77 matching lines @@
   // The next ID that we will return from Add()
   int32 next_id_;
 
   HashTable data_;
 
  private:
   // See description above setter.
   bool check_on_null_data_;
 };
 
-#endif  // BASE_ID_MAP_H__
+#endif  // CHROME_COMMON_ID_MAP_H_