Move core features code to //extensions

extensions/extensions.gyp

 # Copyright 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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'targets': [
     {
@@ skipping 53 matching lines @@
         'common/extension_resource.cc',
         'common/extension_resource.h',
         'common/extension_set.cc',
         'common/extension_set.h',
         'common/extension_urls.cc',
         'common/extension_urls.h',
         'common/extensions_client.cc',
         'common/extensions_client.h',
         'common/feature_switch.cc',
         'common/feature_switch.h',
+        'common/features/api_feature.cc',
+        'common/features/api_feature.h',
+        'common/features/base_feature_provider.cc',
+        'common/features/base_feature_provider.h',
+        'common/features/complex_feature.cc',
+        'common/features/complex_feature.h',
         'common/features/feature.cc',
         'common/features/feature.h',
         'common/features/feature_provider.cc',
         'common/features/feature_provider.h',
+        'common/features/manifest_feature.cc',
+        'common/features/manifest_feature.h',
+        'common/features/permission_feature.cc',
+        'common/features/permission_feature.h',
+        'common/features/simple_feature.cc',
+        'common/features/simple_feature.h',
+        'common/features/simple_feature_filter.cc',
+        'common/features/simple_feature_filter.h',
         'common/file_util.cc',
         'common/file_util.h',
         'common/id_util.cc',
         'common/id_util.h',
         'common/install_warning.cc',
         'common/install_warning.h',
         'common/manifest.cc',
         'common/manifest.h',
         'common/manifest_constants.cc',
         'common/manifest_constants.h',
@@ skipping 298 matching lines @@
         'common/test_util.cc',
         'common/test_util.h',
         'common/value_builder.cc',
         'common/value_builder.h',
       ],
       # Disable c4267 warnings until we fix size_t to int truncations.
       'msvs_disabled_warnings': [ 4267, ],
     },
   ]
 }