wip: Second crack at implementing the touch exploration mode.

ui/aura/test/event_generator.h

Index: ui/aura/test/event_generator.h
diff --git a/ui/aura/test/event_generator.h b/ui/aura/test/event_generator.h
index fe71f2eb82712dcf730abc811851177268bd2aa8..7c3162a537d137a27fed6fe8cb910211c8518f85 100644
--- a/ui/aura/test/event_generator.h
+++ b/ui/aura/test/event_generator.h
@@ -188,6 +188,12 @@ class EventGenerator {
   // Generates a ET_TOUCH_MOVED event to |point| with |touch_id|.
   void MoveTouchId(const gfx::Point& point, int touch_id);
 
+  // Generates ET_TOUCH_STATIONARY event.
+  void StationaryTouch();
+
+  // Generates ET_TOUCH_STATIONARY event with |touch_id|.
+  void StationaryTouchId(int touch_id);
+
   // Generates a touch release event.
   void ReleaseTouch();