ash: Make sure the text-label entries in the tray look consistently good.

ash/system/tray/tray_views.h

Index: ash/system/tray/tray_views.h
diff --git a/ash/system/tray/tray_views.h b/ash/system/tray/tray_views.h
index 4ba0597907d8ba3bfe33064baaae2e570f1fdaf3..bf0267a35efe6cabeeb1a59d6f2fc2b239675362 100644
--- a/ash/system/tray/tray_views.h
+++ b/ash/system/tray/tray_views.h
@@ -13,6 +13,10 @@
 
 class SkBitmap;
 
+namespace views {
+class Label;
+}
+
 namespace ash {
 namespace internal {
 
@@ -61,6 +65,9 @@ class HoverHighlightView : public views::View {
   DISALLOW_COPY_AND_ASSIGN(HoverHighlightView);
 };
 
+// Sets up a Label properly for the tray (sets color, font etc.).
+void SetupLabelForTray(views::Label* label);
+
 }  // namespace internal
 }  // namespace ash