Disables tooltip tests for aura-mus-client

ui/views/test/platform_test_helper.cc

Index: ui/views/test/platform_test_helper.cc
diff --git a/ui/views/test/platform_test_helper.cc b/ui/views/test/platform_test_helper.cc
index 1d309ee25931b11829d15dacd8a0ca940a59056c..b6626189fa390b2141ef70e1ff3704344714770f 100644
--- a/ui/views/test/platform_test_helper.cc
+++ b/ui/views/test/platform_test_helper.cc
@@ -23,6 +23,7 @@ class DefaultPlatformTestHelper : public PlatformTestHelper {
 
 PlatformTestHelper::Factory test_helper_factory;
 bool is_mus = false;
+bool is_aura_mus_client = false;
 
 }  // namespace
 
@@ -48,4 +49,14 @@ bool PlatformTestHelper::IsMus() {
   return is_mus;
 }
 
+// static
+void PlatformTestHelper::SetIsAuraMusClient() {
+  is_aura_mus_client = true;
+}
+
+// static
+bool PlatformTestHelper::IsAuraMusClient() {
+  return is_aura_mus_client;
+}
+
 }  // namespace views