Re-enable Eager Gesture Recognition on Aura

ui/events/gestures/gesture_recognizer.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_EVENTS_GESTURES_GESTURE_RECOGNIZER_H_
 #define UI_EVENTS_GESTURES_GESTURE_RECOGNIZER_H_
 
 #include <vector>
 
 #include "base/memory/scoped_vector.h"
@@ skipping 10 matching lines @@
   static GestureRecognizer* Create();
   static GestureRecognizer* Get();
   static void Reset();
 
   // List of GestureEvent*.
   typedef ScopedVector<GestureEvent> Gestures;
 
   virtual ~GestureRecognizer() {}
 
   // Invoked before event dispatch. If the event is invalid given the current
-  // touch sequence, marks it as handled.
+  // touch sequence, returns false.
   virtual bool ProcessTouchEventPreDispatch(const TouchEvent& event,
                                             GestureConsumer* consumer) = 0;
+
   // Returns a list of zero or more GestureEvents. The caller is responsible for
-  // freeing the returned events. Called synchronously after event dispatch.
-  virtual Gestures* ProcessTouchEventPostDispatch(
+  // freeing the returned events. Acks the first gesture packet in the queue.
+  virtual Gestures* AckAsyncTouchEvent(
       const TouchEvent& event,
       ui::EventResult result,
       GestureConsumer* consumer) = 0;
+
   // Returns a list of zero or more GestureEvents. The caller is responsible for
-  // freeing the returned events. Called when a touch event receives an
-  // asynchronous ack.
-  virtual Gestures* ProcessTouchEventOnAsyncAck(const TouchEvent& event,
-                                                ui::EventResult result,
-                                                GestureConsumer* consumer) = 0;
+  // freeing the returned events. Acks the last gesture packet in the queue.
+  virtual Gestures* AckSyncTouchEvent(const uint64 unique_event_id,
+                                      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
   // state relating to |consumer| to clean up.
   virtual bool CleanupStateForConsumer(GestureConsumer* consumer) = 0;
 
   // Return the window which should handle this TouchEvent, in the case where
   // the touch is already associated with a target.
   // Otherwise, returns null.
   virtual GestureConsumer* GetTouchLockedTarget(const TouchEvent& event) = 0;
@@ skipping 37 matching lines @@
 
   // Unsubscribes |helper| from async gesture dispatch.
   // Since the GestureRecognizer does not own the |helper|, it is not deleted
   // and must be cleaned up appropriately by the caller.
   virtual void RemoveGestureEventHelper(GestureEventHelper* helper) = 0;
 };
 
 }  // namespace ui
 
 #endif  // UI_EVENTS_GESTURES_GESTURE_RECOGNIZER_H_