[ash-md] Makes sure that minimized windows can be activated in overview

ash/wm/overview/window_selector_unittest.cc

Index: ash/wm/overview/window_selector_unittest.cc
diff --git a/ash/wm/overview/window_selector_unittest.cc b/ash/wm/overview/window_selector_unittest.cc
index 4611111f9149e4ca3d00c8b91679f47885c8cba3..76591cc643b0214b09f59325d9107a625ff6e168 100644
--- a/ash/wm/overview/window_selector_unittest.cc
+++ b/ash/wm/overview/window_selector_unittest.cc
@@ -470,12 +470,14 @@ TEST_F(WindowSelectorTest, ActivateMinimized) {
   wm::WMEvent minimize_event(wm::WM_EVENT_MINIMIZE);
   window_state->OnWMEvent(&minimize_event);
   EXPECT_FALSE(window->IsVisible());
+  EXPECT_EQ(0.f, window->layer()->GetTargetOpacity());
   EXPECT_EQ(wm::WINDOW_STATE_TYPE_MINIMIZED,
             wm::GetWindowState(window.get())->GetStateType());
 
   ToggleOverview();
 
   EXPECT_FALSE(window->IsVisible());
+  EXPECT_EQ(0.f, window->layer()->GetTargetOpacity());
   EXPECT_EQ(wm::WINDOW_STATE_TYPE_MINIMIZED,
             wm::GetWindowState(window.get())->GetStateType());
   aura::Window* window_for_minimized_window =
@@ -491,6 +493,7 @@ TEST_F(WindowSelectorTest, ActivateMinimized) {
   EXPECT_FALSE(IsSelecting());
 
   EXPECT_TRUE(window->IsVisible());
+  EXPECT_EQ(1.f, window->layer()->GetTargetOpacity());
   EXPECT_EQ(wm::WINDOW_STATE_TYPE_NORMAL,
             wm::GetWindowState(window.get())->GetStateType());
 }