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

ash/wm/overview/window_selector_unittest.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <algorithm>
 #include <vector>
 
 #include "ash/aura/wm_window_aura.h"
 #include "ash/common/accessibility_delegate.h"
 #include "ash/common/accessibility_types.h"
@@ skipping 452 matching lines @@
 
 // Tests activating minimized window.
 TEST_F(WindowSelectorTest, ActivateMinimized) {
   gfx::Rect bounds(0, 0, 400, 400);
   std::unique_ptr<aura::Window> window(CreateWindow(bounds));
 
   wm::WindowState* window_state = wm::GetWindowState(window.get());
   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 =
       GetOverviewWindowForMinimizedState(0, window.get());
   EXPECT_TRUE(window_for_minimized_window);
 
   const gfx::Point point =
       GetTransformedBoundsInRootWindow(window_for_minimized_window)
           .CenterPoint();
   ui::test::EventGenerator event_generator(window->GetRootWindow(), point);
   event_generator.ClickLeftButton();
 
   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());
 }
 
 // Tests that entering overview mode with an App-list active properly focuses
 // and activates the overview text filter window.
 TEST_F(WindowSelectorTest, TextFilterActive) {
   gfx::Rect bounds(0, 0, 400, 400);
   std::unique_ptr<aura::Window> window1(CreateWindow(bounds));
   wm::ActivateWindow(window1.get());
@@ skipping 1633 matching lines @@
                           HTCAPTION, aura::client::WINDOW_MOVE_SOURCE_MOUSE));
   ASSERT_TRUE(resizer.get());
   gfx::Point location = resizer->GetInitialLocation();
   location.Offset(20, 20);
   resizer->Drag(location, 0);
   ToggleOverview();
   resizer->RevertDrag();
 }
 
 }  // namespace ash