Adding a new component, Previews.

components/components_tests.gyp

Index: components/components_tests.gyp
diff --git a/components/components_tests.gyp b/components/components_tests.gyp
index 4bf7577267ce93e219fb2fad747969a2f1b2993c..c98276ae938ca6354f1a9d52033bac15596a99e9 100644
--- a/components/components_tests.gyp
+++ b/components/components_tests.gyp
@@ -660,20 +660,23 @@
       'prefs/json_pref_store_unittest.cc',
       'prefs/overlay_user_pref_store_unittest.cc',
       'prefs/pref_change_registrar_unittest.cc',
       'prefs/pref_member_unittest.cc',
       'prefs/pref_notifier_impl_unittest.cc',
       'prefs/pref_service_unittest.cc',
       'prefs/pref_value_map_unittest.cc',
       'prefs/pref_value_store_unittest.cc',
       'prefs/scoped_user_pref_update_unittest.cc',
     ],
+    'previews_unittest_sources': [
+      'previews/previews_experiments_unittest.cc',
+    ],
     'query_parser_unittest_sources': [
       'query_parser/query_parser_unittest.cc',
       'query_parser/snippet_unittest.cc',
     ],
     'rappor_unittest_sources': [
       'rappor/bloom_filter_unittest.cc',
       'rappor/byte_vector_utils_unittest.cc',
       'rappor/log_uploader_unittest.cc',
       'rappor/rappor_metric_unittest.cc',
       'rappor/rappor_prefs_unittest.cc',
@@ -1076,20 +1079,21 @@
         '<@(ntp_snippets_unittest_sources)',
         '<@(offline_pages_background_unittest_sources)',
         '<@(offline_pages_unittest_sources)',
         '<@(omnibox_unittest_sources)',
         '<@(open_from_clipboard_unittest_sources)',
         '<@(os_crypt_unittest_sources)',
         '<@(password_manager_unittest_sources)',
         '<@(precache_unittest_sources)',
         '<@(proxy_config_unittest_sources)',
         '<@(prefs_unittest_sources)',
+        '<@(previews_unittest_sources)',
         '<@(query_parser_unittest_sources)',
         '<@(rappor_unittest_sources)',
         '<@(search_engines_unittest_sources)',
         '<@(search_provider_logos_unittest_sources)',
         '<@(search_unittest_sources)',
         '<@(security_state_unittest_sources)',
         '<@(sessions_unittest_sources)',
         '<@(signin_unittest_sources)',
         '<@(ssl_config_unittest_sources)',
         '<@(ssl_errors_unittest_sources)',
@@ -1209,20 +1213,21 @@
         'components.gyp:omnibox_test_support',
         'components.gyp:open_from_clipboard',
         'components.gyp:open_from_clipboard_test_support',
         'components.gyp:os_crypt',
         'components.gyp:os_crypt_test_support',
         'components.gyp:password_manager_core_browser',
         'components.gyp:password_manager_core_browser_test_support',
         'components.gyp:password_manager_sync_browser',
         'components.gyp:precache_core',
         'components.gyp:pref_registry_test_support',
+        'components.gyp:previews',
         'components.gyp:proxy_config',
         'components.gyp:query_parser',
         'components.gyp:rappor',
         'components.gyp:rappor_test_support',
         'components.gyp:search',
         'components.gyp:search_engines',
         'components.gyp:search_engines_test_support',
         'components.gyp:search_provider_logos',
         'components.gyp:security_state',
         'components.gyp:sessions_test_support',