Cleanup coding style

extensions/common/manifest_handler.h

 // Copyright (c) 2013 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 EXTENSIONS_COMMON_MANIFEST_HANDLER_H_
 #define EXTENSIONS_COMMON_MANIFEST_HANDLER_H_
 
+#include <map>
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/lazy_instance.h"
 #include "base/memory/linked_ptr.h"
 #include "base/strings/string16.h"
 #include "extensions/common/manifest.h"
 
 namespace extensions {
@@ skipping 146 matching lines @@
   // The priority for each manifest handler. Handlers with lower priority
   // values are evaluated first.
   ManifestHandlerPriorityMap priority_map_;
 
   bool is_finalized_;
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_COMMON_MANIFEST_HANDLER_H_