Remove duplicated user_prefs::TestingPrefServiceSyncable

extensions/browser/api_unittest.h

Index: extensions/browser/api_unittest.h
diff --git a/extensions/browser/api_unittest.h b/extensions/browser/api_unittest.h
index e4a9157b45d6545cdff2354d5c403efb0196c902..e1404fd05e16bf44a7d22ec267ff05ee008f40a2 100644
--- a/extensions/browser/api_unittest.h
+++ b/extensions/browser/api_unittest.h
@@ -9,7 +9,7 @@
 #include <string>
 
 #include "base/memory/ref_counted.h"
-#include "components/pref_registry/testing_pref_service_syncable.h"
+#include "components/sync_preferences/testing_pref_service_syncable.h"
 #include "extensions/browser/extensions_test.h"
 
 namespace base {
@@ -87,7 +87,7 @@ class ApiUnitTest : public ExtensionsTest {
 
  private:
   std::unique_ptr<content::TestBrowserThreadBundle> thread_bundle_;
-  user_prefs::TestingPrefServiceSyncable testing_pref_service_;
+  sync_preferences::TestingPrefServiceSyncable testing_pref_service_;
 
   // The WebContents used to associate a RenderViewHost with API function calls,
   // or null.