Removes caching of whether the launcher should be visible from

ash/system/web_notification/web_notification_tray.cc

 // 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.
 
 #include "ash/system/web_notification/web_notification_tray.h"
 
+#include "ash/shell.h"
 #include "ash/system/status_area_widget.h"
 #include "ash/system/tray/tray_bubble_view.h"
 #include "ash/system/tray/tray_constants.h"
 #include "ash/system/tray/tray_views.h"
+#include "ash/wm/shelf_layout_manager.h"
 #include "base/bind.h"
 #include "base/message_loop.h"
 #include "base/stringprintf.h"
 #include "base/timer.h"
 #include "base/utf_string_conversions.h"
 #include "grit/ash_resources.h"
 #include "grit/ash_strings.h"
 #include "ui/aura/window.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/models/simple_menu_model.h"
@@ skipping 879 matching lines @@
 
   views::Widget* bubble_widget() const { return bubble_widget_; }
   TrayBubbleView* bubble_view() const { return bubble_view_; }
 
   // Overridden from TrayBubbleView::Host.
   virtual void BubbleViewDestroyed() OVERRIDE {
     bubble_view_ = NULL;
   }
 
   virtual void OnMouseEnteredView() OVERRIDE {
-    tray_->UpdateShouldShowLauncher();
   }
 
   virtual void OnMouseExitedView() OVERRIDE {
-    tray_->UpdateShouldShowLauncher();
   }
 
   virtual void OnClickedOutsideView() OVERRIDE {
     // May delete |this|.
     tray_->HideMessageCenterBubble();
   }
 
   virtual string16 GetAccessibleName() OVERRIDE {
     return tray_->GetAccessibleName();
   }
@@ skipping 225 matching lines @@
   if (message_center_bubble()) {
     UpdateTray();
     return;
   }
   // Indicate that the message center is visible. Clears the unread count.
   notification_list_->SetMessageCenterVisible(true);
   UpdateTray();
   HidePopupBubble();
   message_center_bubble_.reset(new MessageCenterBubble(this));
   status_area_widget()->SetHideSystemNotifications(true);
-  UpdateShouldShowLauncher();
+  Shell::GetInstance()->shelf()->UpdateAutoHideState();
 }
 
 void WebNotificationTray::HideMessageCenterBubble() {
   if (!message_center_bubble())
     return;
   message_center_bubble_.reset();
   show_message_center_on_unlock_ = false;
   notification_list_->SetMessageCenterVisible(false);
   UpdateTray();
   status_area_widget()->SetHideSystemNotifications(false);
-  UpdateShouldShowLauncher();
+  Shell::GetInstance()->shelf()->UpdateAutoHideState();
 }
 
 void WebNotificationTray::SetHidePopupBubble(bool hide) {
   if (hide)
     HidePopupBubble();
   else
     ShowPopupBubble();
 }
 
 void WebNotificationTray::ShowPopupBubble() {
@@ skipping 215 matching lines @@
   return message_center_bubble()->MessageViewsForTest();
 }
 
 size_t WebNotificationTray::GetPopupNotificationCountForTest() const {
   if (!popup_bubble())
     return 0;
   return popup_bubble()->MessageViewsForTest();
 }
 
 }  // namespace ash