Move core features code to //extensions

extensions/common/features/complex_feature.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_FEATURES_COMPLEX_FEATURE_H_
-#define CHROME_COMMON_EXTENSIONS_FEATURES_COMPLEX_FEATURE_H_
+#ifndef EXTENSIONS_COMMON_FEATURES_COMPLEX_FEATURE_H_
+#define EXTENSIONS_COMMON_FEATURES_COMPLEX_FEATURE_H_
 
 #include <string>
 
 #include "base/memory/scoped_vector.h"
 #include "extensions/common/extension.h"
 #include "extensions/common/features/feature.h"
 #include "extensions/common/manifest.h"
 
 namespace extensions {
 
@@ skipping 35 matching lines @@
   virtual bool IsInternal() const OVERRIDE;
 
  private:
   FeatureList features_;
 
   DISALLOW_COPY_AND_ASSIGN(ComplexFeature);
 };
 
 }  // namespace extensions
 
-#endif  // CHROME_COMMON_EXTENSIONS_FEATURES_COMPLEX_FEATURE_H_
+#endif  // EXTENSIONS_COMMON_FEATURES_COMPLEX_FEATURE_H_