[USS] Change the place where SharedModelTypeProcessor got created

sync/internal_api/shared_model_type_processor_unittest.cc

Index: sync/internal_api/shared_model_type_processor_unittest.cc
diff --git a/sync/internal_api/shared_model_type_processor_unittest.cc b/sync/internal_api/shared_model_type_processor_unittest.cc
index 53d173538ad526d613629197dde8a7b58df2f4f5..3d659fc7596a6b2d1a0ec83e397d45ed8894bcd8 100644
--- a/sync/internal_api/shared_model_type_processor_unittest.cc
+++ b/sync/internal_api/shared_model_type_processor_unittest.cc
@@ -142,8 +142,7 @@ class SharedModelTypeProcessorTest : public ::testing::Test,
 
   void CreateProcessor() {
     ASSERT_FALSE(type_processor());
-    set_change_processor(
-        make_scoped_ptr(new SharedModelTypeProcessor(kModelType, this)));
+    InitializeProcessor(kModelType);
   }
 
   void InitializeToMetadataLoaded() {
@@ -372,6 +371,12 @@ class SharedModelTypeProcessorTest : public ::testing::Test,
     return static_cast<SharedModelTypeProcessor*>(change_processor());
   }
 
+ protected:
+  scoped_ptr<syncer_v2::SharedModelTypeProcessor>
+  CreateSharedModelTypeProcessor(syncer::ModelType type) override {
+    return make_scoped_ptr(new SharedModelTypeProcessor(type, this));
+  }
+
  private:
   static std::string GenerateTagHash(const std::string& tag) {
     return syncer::syncable::GenerateSyncableHash(kModelType, tag);