Restore original opacity when exiting 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 1873 matching lines @@
   EXPECT_TRUE(GetWindowItemForWindow(grid_index, window1.get())->dimmed());
   EXPECT_TRUE(GetWindowItemForWindow(grid_index, window2.get())->dimmed());
 
   // All the items should match the empty string. The filter widget should also
   // disappear.
   FilterItems("");
   EXPECT_FALSE(showing_filter_widget());
   EXPECT_FALSE(GetWindowItemForWindow(grid_index, window0.get())->dimmed());
   EXPECT_FALSE(GetWindowItemForWindow(grid_index, window1.get())->dimmed());
   EXPECT_FALSE(GetWindowItemForWindow(grid_index, window2.get())->dimmed());
+
+  FilterItems("Foo");
+
+  EXPECT_NE(1.0f, window0->layer()->GetTargetOpacity());
+  EXPECT_NE(1.0f, window1->layer()->GetTargetOpacity());
+  EXPECT_NE(1.0f, window2->layer()->GetTargetOpacity());
+
+  ToggleOverview();
+
+  EXPECT_EQ(1.0f, window0->layer()->GetTargetOpacity());
+  EXPECT_EQ(1.0f, window1->layer()->GetTargetOpacity());
+  EXPECT_EQ(1.0f, window2->layer()->GetTargetOpacity());
 }
 
 // Tests selecting in the overview with dimmed and undimmed items.
 TEST_F(WindowSelectorTest, TextFilteringSelection) {
   gfx::Rect bounds(0, 0, 100, 100);
   std::unique_ptr<aura::Window> window2(CreateWindow(bounds));
   std::unique_ptr<aura::Window> window1(CreateWindow(bounds));
   std::unique_ptr<aura::Window> window0(CreateWindow(bounds));
   base::string16 window2_title = base::UTF8ToUTF16("Rock and roll");
   base::string16 window1_title = base::UTF8ToUTF16("Rock and");
@@ skipping 221 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