Moved extension_api to src/extensions/common

extensions/common/extension_api.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_API_EXTENSION_API_H_
-#define CHROME_COMMON_EXTENSIONS_API_EXTENSION_API_H_
+#ifndef EXTENSIONS_COMMON_EXTENSION_API_H_
+#define EXTENSIONS_COMMON_EXTENSION_API_H_
 
 #include <map>
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/gtest_prod_util.h"
 #include "base/memory/linked_ptr.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/singleton.h"
 #include "base/strings/string_piece.h"
@@ skipping 114 matching lines @@
 
   // FeatureProviders used for resolving dependencies.
   typedef std::map<std::string, FeatureProvider*> FeatureProviderMap;
   FeatureProviderMap dependency_providers_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionAPI);
 };
 
 } // namespace extensions
 
-#endif  // CHROME_COMMON_EXTENSIONS_API_EXTENSION_API_H_
+#endif  // EXTENSIONS_COMMON_EXTENSION_API_H_