[Sync] Tidy up SyncBackendHost interface.

chrome/browser/sync/glue/sync_backend_host_mock.cc

Index: chrome/browser/sync/glue/sync_backend_host_mock.cc
diff --git a/chrome/browser/sync/glue/sync_backend_host_mock.cc b/chrome/browser/sync/glue/sync_backend_host_mock.cc
index fe488adbfeba40be566e9310b0b25c26cf1cf315..2d618f7281efde9597c591942c18e883fffba81f 100644
--- a/chrome/browser/sync/glue/sync_backend_host_mock.cc
+++ b/chrome/browser/sync/glue/sync_backend_host_mock.cc
@@ -6,6 +6,11 @@
 
 namespace browser_sync {
 
+ACTION(InvokeTask) {
+  arg2->Run();
+  delete arg2;
+}
+
 SyncBackendHostMock::SyncBackendHostMock() {
   // By default, the RequestPause and RequestResume methods will
   // send the confirmation notification and return true.
@@ -17,7 +22,7 @@ SyncBackendHostMock::SyncBackendHostMock() {
                                    testing::Return(true)));
 
   // By default, invoke the ready callback.
-  ON_CALL(*this, ConfigureDataTypes(testing::_, testing::_)).
+  ON_CALL(*this, ConfigureDataTypes(testing::_, testing::_, testing::_)).
       WillByDefault(InvokeTask());
 }