Disables tooltip tests for aura-mus-client

ui/views/test/platform_test_helper.h

Index: ui/views/test/platform_test_helper.h
diff --git a/ui/views/test/platform_test_helper.h b/ui/views/test/platform_test_helper.h
index ada95a28cf07a460a8c62d68a94a45df0ddc07ed..3950007ea4f77967b6fdb70d113afdc6a0a13dcf 100644
--- a/ui/views/test/platform_test_helper.h
+++ b/ui/views/test/platform_test_helper.h
@@ -28,6 +28,9 @@ class PlatformTestHelper {
   static void SetIsMus();
   static bool IsMus();
 
+  static void SetIsAuraMusClient();
+  static bool IsAuraMusClient();
+
   // Called once the ViewsTestHelper has been created, but before SetUp() is
   // called.
   virtual void OnTestHelperCreated(ViewsTestHelper* helper) {}