Eliminate ash::internal namespace

ash/system/tray/tray_item_more.h

Index: ash/system/tray/tray_item_more.h
diff --git a/ash/system/tray/tray_item_more.h b/ash/system/tray/tray_item_more.h
index ae668c5bd81f79bcb4ddef78df48135512f2bf4d..e61f5de89859435c77378acbf8fb40a62460329f 100644
--- a/ash/system/tray/tray_item_more.h
+++ b/ash/system/tray/tray_item_more.h
@@ -15,11 +15,8 @@ class View;
 }
 
 namespace ash {
-
 class SystemTrayItem;
 
-namespace internal {
-
 // A view with a chevron ('>') on the right edge. Clicking on the view brings up
 // the detailed view of the tray-item that owns it.
 class TrayItemMore : public ActionableView {
@@ -58,7 +55,6 @@ class TrayItemMore : public ActionableView {
   DISALLOW_COPY_AND_ASSIGN(TrayItemMore);
 };
 
-}  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_SYSTEM_TRAY_TRAY_ITEM_MORE_H_