Make out arguments non-reference types.

Also, tidy some portable related code.

Change-Id: I67c8aa52eef8b556ca117ecda1b1e75465ba06a5
diff --git a/compiler/driver/compiler_driver_test.cc b/compiler/driver/compiler_driver_test.cc
index 34806ce..2b3af62 100644
--- a/compiler/driver/compiler_driver_test.cc
+++ b/compiler/driver/compiler_driver_test.cc
@@ -40,7 +40,7 @@
     timings.StartSplit("CompileAll");
     compiler_driver_->CompileAll(class_loader,
                                  Runtime::Current()->GetCompileTimeClassPath(class_loader),
-                                 timings);
+                                 &timings);
     MakeAllExecutable(class_loader);
     timings.EndSplit();
   }