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..c4df53049a25679e29e620be348ecb14457ef411 100644
--- a/ui/events/gestures/gesture_recognizer.h
+++ b/ui/events/gestures/gesture_recognizer.h
@@ -28,12 +28,27 @@ class EVENTS_EXPORT GestureRecognizer {
   virtual ~GestureRecognizer() {}
 
   // Invoked for each touch event that could contribute to the current gesture.
+  // Returns false iff the touch event is invalid in some way, and should not be
+  // processed further.
+  virtual bool ProcessTouchEventForGesture(const TouchEvent& event,
+                                           GestureConsumer* consumer) = 0;
+
+  // TODO(tdresser): remove during cleanup of old Aura GR, as part of
+  // crbug.com/332418.
+  // 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 Gestures* ProcessTouchEventForGestureForOldAuraGR(
+      const TouchEvent& event,
+      ui::EventResult result,
+      GestureConsumer* target) = 0;
+
+  // Sends an ack to the gesture detector, and returns any gestures triggered by
+  // the ack.
+  virtual ScopedVector<GestureEvent>* AckTouchEventForGesture(
+      ui::EventResult result,
+      GestureConsumer* target) = 0;
 
   // This is called when the consumer is destroyed. So this should cleanup any
   // internal state maintained for |consumer|. Returns true iff there was