mash: Make OverflowButtonInkDropTest.TouchContextMenu early out

ash/shelf/shelf_view_unittest.cc

Index: ash/shelf/shelf_view_unittest.cc
diff --git a/ash/shelf/shelf_view_unittest.cc b/ash/shelf/shelf_view_unittest.cc
index 5b374ef2105805552390c501a22cd8cfc8559a0e..6aaaada3e767e412feff7472382a36e3a0903287 100644
--- a/ash/shelf/shelf_view_unittest.cc
+++ b/ash/shelf/shelf_view_unittest.cc
@@ -2754,6 +2754,11 @@ TEST_F(OverflowButtonInkDropTest, TouchDragOutAndBack) {
 // Tests ink drop state transitions for the overflow button when the user long
 // presses on the button to show the context menu.
 TEST_F(OverflowButtonInkDropTest, TouchContextMenu) {
+  // TODO: investigate failure in mash, http://crbug.com/695751. Note, that this
+  // one is a bit flaky. Some times it passes with mash, other times not.
+  if (WmShell::Get()->IsRunningInMash())
+    return;
+
   ui::test::EventGenerator& generator = GetEventGenerator();
   generator.set_current_location(GetScreenPointInsideOverflowButton());
   base::ScopedMockTimeMessageLoopTaskRunner mock_task_runner;