[USS] Change the place where SharedModelTypeProcessor got created

components/sync_driver/device_info_service_unittest.cc

Index: components/sync_driver/device_info_service_unittest.cc
diff --git a/components/sync_driver/device_info_service_unittest.cc b/components/sync_driver/device_info_service_unittest.cc
index 4cd69c6e6db3d95cbd604986e490496148032718..1f73d2b43dbb5dd81fd2fbb04aef6375cc4058d5 100644
--- a/components/sync_driver/device_info_service_unittest.cc
+++ b/components/sync_driver/device_info_service_unittest.cc
@@ -19,6 +19,7 @@
 #include "sync/api/entity_data.h"
 #include "sync/api/metadata_batch.h"
 #include "sync/api/model_type_store.h"
+#include "sync/internal_api/public/shared_model_type_processor.h"
 #include "sync/internal_api/public/test/model_type_store_test_util.h"
 #include "sync/protocol/data_type_state.pb.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ -135,6 +136,8 @@ class FakeModelTypeChangeProcessor : public ModelTypeChangeProcessor {
     std::swap(metadata_, batch);
   }
 
+  void OnSyncStarting(const StartCallback& callback) override {}
+
   const std::map<std::string, scoped_ptr<EntityData>>& put_map() const {
     return put_map_;
   }
@@ -163,7 +166,13 @@ class DeviceInfoServiceTest : public testing::Test,
 
   void OnDeviceInfoChange() override { change_count_++; }
 
- protected:
+  scoped_ptr<ModelTypeChangeProcessor> CreateSharedModelTypeProcessor(
+      syncer::ModelType type,
+      ModelTypeService* service) {
+    processor_ = new FakeModelTypeChangeProcessor();
+    return make_scoped_ptr(processor_);
+  }
+
   DeviceInfoServiceTest()
       : change_count_(0),
         store_(ModelTypeStoreTestUtil::CreateInMemoryStoreForTest()),
@@ -182,7 +191,9 @@ class DeviceInfoServiceTest : public testing::Test,
     service_.reset(new DeviceInfoService(
         local_device_.get(),
         base::Bind(&ModelTypeStoreTestUtil::MoveStoreToCallback,
-                   base::Passed(&store_))));
+                   base::Passed(&store_)),
+        base::Bind(&DeviceInfoServiceTest::CreateSharedModelTypeProcessor,
+                   base::Unretained(this))));
     service_->AddObserver(this);
   }
 
@@ -197,8 +208,8 @@ class DeviceInfoServiceTest : public testing::Test,
   // pump in this scenario because metadata is going to need to be loading from
   // the store and given to the processor, which is async.
   void SetProcessorAndPump() {
-    processor_ = new FakeModelTypeChangeProcessor();
-    service()->set_change_processor(make_scoped_ptr(processor_));
+    EXPECT_EQ(processor_, service_->GetOrCreateChangeProcessor());
+    ASSERT_TRUE(processor_);
     base::RunLoop().RunUntilIdle();
   }