Enable mash_unittests on CrOS Ozone trybot.

ash/mus/app_launch_unittest.cc

Index: ash/mus/app_launch_unittest.cc
diff --git a/ash/mus/app_launch_unittest.cc b/ash/mus/app_launch_unittest.cc
index 50df2d4897fb3a972fdca7f8b0fd08d593573e3b..3db6380178d260a1ba4396dff8044f785807b1fb 100644
--- a/ash/mus/app_launch_unittest.cc
+++ b/ash/mus/app_launch_unittest.cc
@@ -36,12 +36,7 @@ class AppLaunchTest : public service_manager::test::ServiceTest {
 // (ash::MaterialDesignController::IsShelfMaterial()). See
 // crbug.com/660194 and crbug.com/642879.
 // TODO(rockot): Reenable this test.
-#if defined(USE_OZONE)
-#define MAYBE_TestQuickLaunch TestQuickLaunch
-#else
-#define MAYBE_TestQuickLaunch DISABLED_TestQuickLaunch
-#endif  // defined(USE_OZONE)
-TEST_F(AppLaunchTest, MAYBE_TestQuickLaunch) {
+TEST_F(AppLaunchTest, DISABLED_TestQuickLaunch) {
   connector()->Connect("ash");
   connector()->Connect(mash::quick_launch::mojom::kServiceName);