Add the basic infrastructure for the Behavior feature type: BehaviorFeature and

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 126 matching lines @@
         'common/features/json_feature_provider_source.cc',
         'common/features/json_feature_provider_source.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/features/switch_feature.cc',
+        'common/features/switch_feature.h',
         'common/file_util.cc',
         'common/file_util.h',
         'common/guest_view/guest_view_constants.cc',
         'common/guest_view/guest_view_constants.h',
         'common/install_warning.cc',
         'common/install_warning.h',
         'common/manifest.cc',
         'common/manifest.h',
         'common/manifest_constants.cc',
         'common/manifest_constants.h',
@@ skipping 1109 matching lines @@
       'conditions': [
         ['OS=="win" and win_use_allocator_shim==1', {
           'dependencies': [
             '../base/allocator/allocator.gyp:allocator',
           ],
         }],
       ],
     },
   ]
 }