sync: Use base::MessageLoop.

sync/internal_api/sync_manager_impl_unittest.cc

Index: sync/internal_api/sync_manager_impl_unittest.cc
diff --git a/sync/internal_api/sync_manager_impl_unittest.cc b/sync/internal_api/sync_manager_impl_unittest.cc
index 8367725004c5a796f0c44ceba48f81fd43a0d177..01b776e2f299982f74e1ba70172ab35977ddf75b 100644
--- a/sync/internal_api/sync_manager_impl_unittest.cc
+++ b/sync/internal_api/sync_manager_impl_unittest.cc
@@ -231,7 +231,7 @@ class SyncApiTest : public testing::Test {
   }
 
  protected:
-  MessageLoop message_loop_;
+  base::MessageLoop message_loop_;
   TestUserShare test_user_share_;
 };
 
@@ -1016,7 +1016,7 @@ class SyncManagerTest : public testing::Test,
 
  private:
   // Needed by |sync_manager_|.
-  MessageLoop message_loop_;
+  base::MessageLoop message_loop_;
   // Needed by |sync_manager_|.
   base::ScopedTempDir temp_dir_;
   // Sync Id's for the roots of the enabled datatypes.