Componentize //chrome/browser/prefs/tracked.

components/components_tests.gyp

Index: components/components_tests.gyp
diff --git a/components/components_tests.gyp b/components/components_tests.gyp
index e0e1e5301245b59ab74ca77232fb2b8dba84e7c5..8882d247e8b03e611b90f9b79b7d624e829442aa 100644
--- a/components/components_tests.gyp
+++ b/components/components_tests.gyp
@@ -444,6 +444,17 @@
       'precache/core/precache_fetcher_unittest.cc',
       'precache/core/precache_url_table_unittest.cc',
     ],
+    'prefs_tracker_unittest_sources': [
+      'prefs_tracker/device_id_unittest.cc',
+      'prefs_tracker/mock_validation_delegate.cc',
+      'prefs_tracker/mock_validation_delegate.h',
+      'prefs_tracker/pref_hash_calculator_unittest.cc',
+      'prefs_tracker/pref_hash_filter_unittest.cc',
+      'prefs_tracker/pref_hash_store_impl_unittest.cc',
+      'prefs_tracker/pref_service_hash_store_contents_unittest.cc',
+      'prefs_tracker/segregated_pref_store_unittest.cc',
+      'prefs_tracker/tracked_preferences_migration_unittest.cc',
+    ],
     'proximity_auth_unittest_sources': [
       'proximity_auth/ble/bluetooth_low_energy_characteristics_finder_unittest.cc',
       'proximity_auth/ble/bluetooth_low_energy_connection_finder_unittest.cc',
@@ -728,6 +739,7 @@
         '<@(packed_ct_ev_whitelist_unittest_sources)',
         '<@(password_manager_unittest_sources)',
         '<@(precache_unittest_sources)',
+        '<@(prefs_tracker_unittest_sources)',
         '<@(proxy_config_unittest_sources)',
         '<@(query_parser_unittest_sources)',
         '<@(rappor_unittest_sources)',
@@ -837,6 +849,7 @@
         'components.gyp:password_manager_core_browser_test_support',
         'components.gyp:precache_core',
         'components.gyp:pref_registry_test_support',
+        'components.gyp:prefs_tracker',
         'components.gyp:proxy_config',
         'components.gyp:query_parser',
         'components.gyp:rappor',