ash: Update launcher background to 0.8 black.

ash/launcher/launcher_types.h

 // Copyright (c) 2012 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.
 
 #ifndef ASH_LAUNCHER_LAUNCHER_TYPES_H_
 #define ASH_LAUNCHER_LAUNCHER_TYPES_H_
 
 #include <vector>
 
 #include "ash/ash_export.h"
 #include "ui/gfx/image/image_skia.h"
 
 namespace aura {
 class Window;
 }
 
 namespace ash {
 
 typedef int LauncherID;
 
 // Height of the Launcher. Hard coded to avoid resizing as items are
 // added/removed.
 ASH_EXPORT extern const int kLauncherPreferredSize;
 
+// Max alpha of the launcher background.
+ASH_EXPORT extern const int kLauncherBackgroundAlpha;
+
 // Type the LauncherItem represents.
 enum LauncherItemType {
   // Represents a tabbed browser.
   TYPE_TABBED,
 
   // Represents a running app panel.
   TYPE_APP_PANEL,
 
   // Represents a pinned shortcut to an app.
   TYPE_APP_SHORTCUT,
@@ skipping 50 matching lines @@
 
 // The direction of the focus cycling.
 enum CycleDirection {
   CYCLE_FORWARD,
   CYCLE_BACKWARD
 };
 
 }  // namespace ash
 
 #endif  // ASH_LAUNCHER_LAUNCHER_TYPES_H_