Eager Gesture Recognition on Aura

ui/events/gestures/gesture_recognizer.h

Index: ui/events/gestures/gesture_recognizer.h
diff --git a/ui/events/gestures/gesture_recognizer.h b/ui/events/gestures/gesture_recognizer.h
index 4b31e57bd71fbc79bf71271934e85ed52aad5947..1414139d702d4c863506c5334d1e008f3c1d2498 100644
--- a/ui/events/gestures/gesture_recognizer.h
+++ b/ui/events/gestures/gesture_recognizer.h
@@ -27,13 +27,14 @@ class EVENTS_EXPORT GestureRecognizer {
 
   virtual ~GestureRecognizer() {}
 
-  // Invoked for each touch event that could contribute to the current gesture.
-  // Returns list of zero or more GestureEvents identified after processing
-  // TouchEvent.
-  // Caller would be responsible for freeing up Gestures.
-  virtual Gestures* ProcessTouchEventForGesture(const TouchEvent& event,
-                                                ui::EventResult result,
-                                                GestureConsumer* consumer) = 0;
+  virtual bool ProcessTouchEventPreDispatch(const TouchEvent& event,
+                                            GestureConsumer* consumer) = 0;
+  virtual Gestures* ProcessTouchEventPostDispatch(const TouchEvent& event,

[jdduke (slow), 2014/08/01 14:27:22]

This is great! Probably worth keeping the comment about the caller's
responsibility for freeing |Gestures*| (and the semantic difference between
PostDispatch and OnAsyncAck).  Thanks!

[tdresser, 2014/08/01 18:54:00]

Done.

+                                             ui::EventResult result,
+                                             GestureConsumer* consumer) = 0;
+  virtual Gestures* ProcessTouchEventOnAsyncAck(const TouchEvent& event,
+                                               ui::EventResult result,
+                                               GestureConsumer* consumer) = 0;
 
   // This is called when the consumer is destroyed. So this should cleanup any
   // internal state maintained for |consumer|. Returns true iff there was