Move manifest_handler_helpers to //extensions

extensions/common/manifest_handler_helpers.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 CHROME_COMMON_EXTENSIONS_MANIFEST_HANDLER_HELPERS_H_
-#define CHROME_COMMON_EXTENSIONS_MANIFEST_HANDLER_HELPERS_H_
+#ifndef EXTENSIONS_COMMON_MANIFEST_HANDLER_HELPERS_H_
+#define EXTENSIONS_COMMON_MANIFEST_HANDLER_HELPERS_H_
 
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/string16.h"
 
 class ExtensionIconSet;
 
 namespace base {
 class DictionaryValue;
@@ skipping 12 matching lines @@
 // Returns success. If load fails, |error| will be set.
 bool LoadIconsFromDictionary(const base::DictionaryValue* icons_value,
                              const int* icon_sizes,
                              size_t num_icon_sizes,
                              ExtensionIconSet* icons,
                              base::string16* error);
 
 }  // namespace manifest_handler_helpers
 }  // namespace extensions
 
-#endif  // CHROME_COMMON_EXTENSIONS_MANIFEST_HANDLER_HELPERS_H_
+#endif  // EXTENSIONS_COMMON_MANIFEST_HANDLER_HELPERS_H_