Enable sync_driver tests with GN

components/sync_driver/BUILD.gn

Index: components/sync_driver/BUILD.gn
diff --git a/components/sync_driver/BUILD.gn b/components/sync_driver/BUILD.gn
index 9dd241bdce97b8b6a551b6d7a60d311c0f398074..e4761f830425355ec99b24a4eb3fabefb824c9a5 100644
--- a/components/sync_driver/BUILD.gn
+++ b/components/sync_driver/BUILD.gn
@@ -100,12 +100,29 @@ static_library("sync_driver") {
 source_set("unit_tests") {
   testonly = true
   sources = [
+    "data_type_manager_impl_unittest.cc",
+    "device_info_data_type_controller_unittest.cc",
+    "device_info_sync_service_unittest.cc",
+    "generic_change_processor_unittest.cc",
+    "model_association_manager_unittest.cc",
+    "non_blocking_data_type_controller_unittest.cc",
+    "non_ui_data_type_controller_unittest.cc",
+    "shared_change_processor_unittest.cc",
+    "sync_policy_handler_unittest.cc",
+    "sync_prefs_unittest.cc",
+    "system_encryptor_unittest.cc",
     "tab_node_pool_unittest.cc",
+    "ui_data_type_controller_unittest.cc",
   ]
 
   deps = [
     ":sync_driver",
+    ":test_support",
+    "//base",
+    "//components/os_crypt",
+    "//components/pref_registry",
     "//sync",
+    "//testing/gmock",
     "//testing/gtest",
   ]
 }