Eliminate ash::internal namespace

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 0b2f7d003a4d1d6cb718e929f9c33f2db273c9c7..ac2cffbf3c7fc38f8dc5f0a3934fb144e4a4c914 100644
--- a/ash/system/status_area_widget.cc
+++ b/ash/system/status_area_widget.cc
@@ -28,12 +28,10 @@
 
 namespace ash {
 
-namespace internal {
-
 const char StatusAreaWidget::kNativeViewName[] = "StatusAreaWidget";
 
 StatusAreaWidget::StatusAreaWidget(aura::Window* status_container)
-    : status_area_widget_delegate_(new internal::StatusAreaWidgetDelegate),
+    : status_area_widget_delegate_(new StatusAreaWidgetDelegate),
       overview_button_tray_(NULL),
       system_tray_(NULL),
       web_notification_tray_(NULL),
@@ -191,5 +189,4 @@ void StatusAreaWidget::UpdateAfterLoginStatusChange(
     overview_button_tray_->UpdateAfterLoginStatusChange(login_status);
 }
 
-}  // namespace internal
 }  // namespace ash