Rename Launcher to Shelf.

ash/system/status_area_widget.cc

Index: ash/system/status_area_widget.cc
diff --git a/ash/system/status_area_widget.cc b/ash/system/status_area_widget.cc
index 19649b1731d95fda2492050e3a706fe59ae2bb2b..305dab80eaba79c9a10d1c68000cc1576891d3d7 100644
--- a/ash/system/status_area_widget.cc
+++ b/ash/system/status_area_widget.cc
@@ -76,16 +76,16 @@ void StatusAreaWidget::Shutdown() {
   system_tray_ = NULL;
 }
 
-bool StatusAreaWidget::ShouldShowLauncher() const {
-  if ((system_tray_ && system_tray_->ShouldShowLauncher()) ||
+bool StatusAreaWidget::ShouldShowShelf() const {
+  if ((system_tray_ && system_tray_->ShouldShowShelf()) ||
       (web_notification_tray_ &&
-       web_notification_tray_->ShouldBlockLauncherAutoHide()))
+       web_notification_tray_->ShouldBlockShelfAutoHide()))
     return true;
 
-  if (!RootWindowController::ForLauncher(GetNativeView())->shelf()->IsVisible())
+  if (!RootWindowController::ForShelf(GetNativeView())->shelf()->IsVisible())
     return false;
 
-  // If the launcher is currently visible, don't hide the launcher if the mouse
+  // If the shelf is currently visible, don't hide the shelf if the mouse
   // is in any of the notification bubbles.
   return (system_tray_ && system_tray_->IsMouseInNotificationBubble()) ||
         (web_notification_tray_ &&