ash: Make the touchy heads-up display more colorful/useful.

ash/touch/touch_observer_hud.h

Index: ash/touch/touch_observer_hud.h
diff --git a/ash/touch/touch_observer_hud.h b/ash/touch/touch_observer_hud.h
index 3da6a5624530d0877b1b9356c8c8979bab85d034..aefa62d802c25bf2d8336964e7c49fe9e816a3b4 100644
--- a/ash/touch/touch_observer_hud.h
+++ b/ash/touch/touch_observer_hud.h
@@ -24,6 +24,8 @@ class Widget;
 namespace ash {
 namespace internal {
 
+class TouchHudCanvas;
+
 // An event filter which handles system level gesture events.
 class TouchObserverHUD : public aura::EventFilter {
  public:
@@ -45,7 +47,9 @@ class TouchObserverHUD : public aura::EventFilter {
       aura::GestureEvent* event) OVERRIDE;
 
   static const int kMaxTouchPoints = 32;
+
   scoped_ptr<views::Widget> widget_;
+  TouchHudCanvas* canvas_;
   views::Label* touch_labels_[kMaxTouchPoints];
   gfx::Point touch_positions_[kMaxTouchPoints];
   ui::EventType touch_status_[kMaxTouchPoints];