Move all files related to tracked preferences from c/b/prefs to c/b/prefs/tracked.

chrome/chrome_tests_unit.gypi

Index: chrome/chrome_tests_unit.gypi
diff --git a/chrome/chrome_tests_unit.gypi b/chrome/chrome_tests_unit.gypi
index 38c49cbdeb4d98269562c37b26a2f7456827b9e6..5d45b5999d4ea909dfb99eaefccb8c314d64aa2b 100644
--- a/chrome/chrome_tests_unit.gypi
+++ b/chrome/chrome_tests_unit.gypi
@@ -590,11 +590,6 @@
       'browser/prefs/command_line_pref_store_unittest.cc',
       'browser/prefs/incognito_mode_prefs_unittest.cc',
       'browser/prefs/leveldb_pref_store_unittest.cc',
-      'browser/prefs/mock_validation_delegate.cc',
-      'browser/prefs/mock_validation_delegate.h',
-      'browser/prefs/pref_hash_calculator_unittest.cc',
-      'browser/prefs/pref_hash_filter_unittest.cc',
-      'browser/prefs/pref_hash_store_impl_unittest.cc',
       'browser/prefs/pref_model_associator_unittest.cc',
       'browser/prefs/prefs_syncable_service_unittest.cc',
       'browser/prefs/profile_pref_store_manager_unittest.cc',
@@ -602,6 +597,11 @@
       'browser/prefs/proxy_policy_unittest.cc',
       'browser/prefs/proxy_prefs_unittest.cc',
       'browser/prefs/session_startup_pref_unittest.cc',
+      'browser/prefs/tracked/mock_validation_delegate.cc',
+      'browser/prefs/tracked/mock_validation_delegate.h',
+      'browser/prefs/tracked/pref_hash_calculator_unittest.cc',
+      'browser/prefs/tracked/pref_hash_filter_unittest.cc',
+      'browser/prefs/tracked/pref_hash_store_impl_unittest.cc',
       'browser/prefs/tracked/pref_service_hash_store_contents_unittest.cc',
       'browser/prefs/tracked/segregated_pref_store_unittest.cc',
       'browser/prefs/tracked/tracked_preferences_migration_unittest.cc',