Remove ShouldBlockShelfAutoHide().

ash/system/web_notification/web_notification_tray.cc

Index: ash/system/web_notification/web_notification_tray.cc
diff --git a/ash/system/web_notification/web_notification_tray.cc b/ash/system/web_notification/web_notification_tray.cc
index e3bc136932ceea183ae2b488808f4db1a92912b5..eafdca6f1fc9d1ee4bfbeedd53977c29ad8304cb 100644
--- a/ash/system/web_notification/web_notification_tray.cc
+++ b/ash/system/web_notification/web_notification_tray.cc
@@ -274,8 +274,7 @@ WebNotificationTray::WebNotificationTray(WmShelf* shelf,
       status_area_window_(status_area_window),
       system_tray_(system_tray),
       show_message_center_on_unlock_(false),
-      should_update_tray_content_(false),
-      should_block_shelf_auto_hide_(false) {
+      should_update_tray_content_(false) {
   DCHECK(shelf);
   DCHECK(status_area_window_);
   DCHECK(system_tray_);
@@ -323,7 +322,6 @@ bool WebNotificationTray::ShowMessageCenterInternal(bool show_settings) {
   if (!ShouldShowMessageCenter())
     return false;
 
-  should_block_shelf_auto_hide_ = true;
   message_center::MessageCenterBubble* message_center_bubble =
       new message_center::MessageCenterBubble(message_center(),
                                               message_center_tray_.get());
@@ -364,7 +362,6 @@ void WebNotificationTray::HideMessageCenter() {
     return;
   SetIsActive(false);
   message_center_bubble_.reset();
-  should_block_shelf_auto_hide_ = false;
   show_message_center_on_unlock_ = false;
   shelf()->UpdateAutoHideState();
 }
@@ -397,10 +394,6 @@ bool WebNotificationTray::ShouldShowMessageCenter() const {
   return Shell::Get()->session_controller()->ShouldShowNotificationTray();
 }
 
-bool WebNotificationTray::ShouldBlockShelfAutoHide() const {
-  return should_block_shelf_auto_hide_;
-}
-
 bool WebNotificationTray::IsMessageCenterBubbleVisible() const {
   return (message_center_bubble() &&
           message_center_bubble()->bubble()->IsVisible());