ash: Refactor touch hud drawing to ash/touch_hud as a separate component.

ash/touch/touch_observer_hud_unittest.cc

Index: ash/touch/touch_observer_hud_unittest.cc
diff --git a/ash/touch/touch_observer_hud_unittest.cc b/ash/touch/touch_observer_hud_unittest.cc
index 7eec15c0cd94e33a3c9c926b92f37d94b029fd4b..de288b089321d84f1b5438fe55e770a0ce480d61 100644
--- a/ash/touch/touch_observer_hud_unittest.cc
+++ b/ash/touch/touch_observer_hud_unittest.cc
@@ -17,6 +17,7 @@
 #include "base/format_macros.h"
 #include "base/strings/stringprintf.h"
 #include "ui/aura/window.h"
+#include "ui/views/controls/touch/touch_hud_drawer.h"
 #include "ui/views/widget/widget.h"
 
 namespace ash {
@@ -283,7 +284,7 @@ class TouchHudProjectionTest : public TouchHudTestBase {
   }
 
   int GetInternalTouchPointsCount() {
-    return GetInternalTouchHudProjection()->points_.size();
+    return GetInternalTouchHudProjection()->touch_hud_drawer_->points_.size();
   }
 
   void SendTouchEventToInternalHud(ui::EventType type,