Sync: Add DeviceInfo's ChangeProcessor

sync/test/engine/test_directory_setter_upper.h

Index: sync/test/engine/test_directory_setter_upper.h
diff --git a/sync/test/engine/test_directory_setter_upper.h b/sync/test/engine/test_directory_setter_upper.h
index a8c5e5e9c3a67da992ad74d118a5a52662a6afcb..8d2a0dcf3a4f951b5fcfe6140f4f72c311d528cd 100644
--- a/sync/test/engine/test_directory_setter_upper.h
+++ b/sync/test/engine/test_directory_setter_upper.h
@@ -39,12 +39,13 @@
 #include "sync/util/test_unrecoverable_error_handler.h"
 #include "testing/gmock/include/gmock/gmock.h"
 
+namespace syncer {
+
 namespace syncable {
   class Directory;
+  class MockTransactionObserver;
 }
 
-namespace syncer {
-
 class TestDirectorySetterUpper {
  public:
   TestDirectorySetterUpper();
@@ -62,8 +63,13 @@ class TestDirectorySetterUpper {
 
   SyncEncryptionHandler* encryption_handler() { return &encryption_handler_; }
 
+  syncable::MockTransactionObserver* transaction_observer() {
+    return mock_transaction_observer_.get();
+  }
+
  private:
   syncable::NullDirectoryChangeDelegate delegate_;
+  scoped_ptr<syncable::MockTransactionObserver> mock_transaction_observer_;
   TestUnrecoverableErrorHandler handler_;
 
   void RunInvariantCheck();