Fixing invalid window opacity/visibility combination with the shelf

ash/root_window_controller_unittest.cc

Index: ash/root_window_controller_unittest.cc
diff --git a/ash/root_window_controller_unittest.cc b/ash/root_window_controller_unittest.cc
index 3edd28013e160131fde6d374312f1c40f5da724c..4666eadcdf9297e5fab3b08627049abc560a676b 100644
--- a/ash/root_window_controller_unittest.cc
+++ b/ash/root_window_controller_unittest.cc
@@ -583,6 +583,13 @@ typedef test::NoSessionAshTestBase NoSessionRootWindowControllerTest;
 
 // Make sure that an event handler exists for entire display area.
 TEST_F(NoSessionRootWindowControllerTest, Event) {
+  // Hide the shelf since it might otherwise get an event target.
+  RootWindowController* controller = Shell::GetPrimaryRootWindowController();
+  ShelfLayoutManager* shelf_layout_manager =
+      controller->GetShelfLayoutManager();
+  shelf_layout_manager->SetAutoHideBehavior(
+      ash::SHELF_AUTO_HIDE_ALWAYS_HIDDEN);
+
   aura::Window* root = Shell::GetPrimaryRootWindow();
   const gfx::Size size = root->bounds().size();
   aura::Window* event_target = root->GetEventHandlerForPoint(gfx::Point(0, 0));