Implement message center on Windows

ui/message_center/message_view.h

Index: ui/message_center/message_view.h
diff --git a/ui/message_center/message_view.h b/ui/message_center/message_view.h
index 3d113e383a3b3671ff30bf95b65238cf0ab2e3bd..ae7de37b96e6e87092026f79970ca2c70517a9e2 100644
--- a/ui/message_center/message_view.h
+++ b/ui/message_center/message_view.h
@@ -17,6 +17,12 @@ class ScrollView;
 
 namespace message_center {
 
+#ifdef USE_AURA
+typedef views::SlideOutView MessageViewBase;
+#else
+typedef views::View MessageViewBase;
+#endif
+
 // Individual notifications constants.
 const int kPaddingBetweenItems = 10;
 const int kPaddingHorizontal = 18;
@@ -25,8 +31,9 @@ const int kWebNotificationIconSize = 40;
 const int kWebNotificationWidth = 300;
 
 // An abstract class that forms the basis of a view for a notification entry.
-class MessageView : public views::SlideOutView,
-                    public views::ButtonListener {
+class MessageView
+    : public views::ButtonListener,
+      public MessageViewBase {
  public:
   MessageView(NotificationList::Delegate* list_delegate,
               const NotificationList::Notification& notification);
@@ -55,8 +62,10 @@ class MessageView : public views::SlideOutView,
   // Shows the menu for the notification.
   void ShowMenu(gfx::Point screen_location);
 
+#ifdef USE_AURA
   // Overridden from views::SlideOutView.
   virtual void OnSlideOut() OVERRIDE;
+#endif
 
   NotificationList::Delegate* list_delegate_;
   NotificationList::Notification notification_;