Add new attention state to launcher

ash/launcher/launcher_button.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_BUTTON_H_
 #define ASH_LAUNCHER_LAUNCHER_BUTTON_H_
 #pragma once
 
 #include "ui/views/controls/button/custom_button.h"
 #include "ui/views/controls/image_view.h"
 
 namespace ash {
 namespace internal {
 
 class LauncherButtonHost;
 
 // Button used for items on the launcher, except for the AppList.
 class LauncherButton : public views::CustomButton {
  public:
   // Used to indicate the current state of the button.
   enum State {
-    STATE_NORMAL  = 0,
-    STATE_HOVERED = 1 << 0,
-    STATE_RUNNING = 1 << 1,
-    STATE_ACTIVE  = 1 << 2
+    STATE_NORMAL    = 0,
+    STATE_HOVERED   = 1 << 0,
+    STATE_RUNNING   = 1 << 1,
+    STATE_ACTIVE    = 1 << 2,
+    STATE_ATTENTION = 1 << 3,
   };
 
   virtual ~LauncherButton();
 
   // Called to create an instance of a LauncherButton.
   static LauncherButton* Create(views::ButtonListener* listener,
                                 LauncherButtonHost* host);
 
   // Sets the image to display for this entry.
   void SetImage(const SkBitmap& image);
@@ skipping 43 matching lines @@
   // Sets the icon image with a shadow.
   void SetShadowedImage(const SkBitmap& bitmap);
   // Override for custom initialization.
   virtual void Init();
   // Override to subclass IconView.
   virtual IconView* CreateIconView();
   IconView* icon_view() const { return icon_view_; }
   LauncherButtonHost* host() const { return host_; }
 
  private:
+  class BarView;
   // Updates the parts of the button to reflect the current state_. This may
   // add or remove views, layout and paint.
   void UpdateState();
 
   LauncherButtonHost* host_;
   IconView* icon_view_;
   // Draws a bar underneath the image to represent the state of the application.
-  views::ImageView* bar_;
+  BarView* bar_;
   // The current state of the application, multiple values of AppState are or'd
   // together.
   int state_;
 
   DISALLOW_COPY_AND_ASSIGN(LauncherButton);
 };
 
 }  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_LAUNCHER_APP_LAUNCHER_BUTTON_H_