Re-enable Eager Gesture Recognition on Aura

ui/events/gestures/gesture_recognizer_impl_mac.cc

Index: ui/events/gestures/gesture_recognizer_impl_mac.cc
diff --git a/ui/events/gestures/gesture_recognizer_impl_mac.cc b/ui/events/gestures/gesture_recognizer_impl_mac.cc
index a0d4ba45a9d16ebfa18a261165ce46051b7fd71f..ceab0d9e86f7db4af9bffefc5f615e8cba2c6c44 100644
--- a/ui/events/gestures/gesture_recognizer_impl_mac.cc
+++ b/ui/events/gestures/gesture_recognizer_impl_mac.cc
@@ -17,21 +17,17 @@ class GestureRecognizerImplMac : public GestureRecognizer {
   ~GestureRecognizerImplMac() override {}
 
  private:
-  bool ProcessTouchEventPreDispatch(const TouchEvent& event,
-                                    GestureConsumer* consumer) override {
+  virtual bool ProcessTouchEvent(
+      const TouchEvent& event,
+      GestureConsumer* consumer) override {
     return false;
   }
-
-  Gestures* ProcessTouchEventPostDispatch(const TouchEvent& event,
-                                          ui::EventResult result,
-                                          GestureConsumer* consumer) override {
-    return NULL;
+  virtual Gestures* ProcessTouchEventAck(
+      const TouchEvent& event,
+      ui::EventResult result,
+      GestureConsumer* consumer) override {
+    return nullptr;
   }
-  Gestures* ProcessTouchEventOnAsyncAck(const TouchEvent& event,
-                                        ui::EventResult result,
-                                        GestureConsumer* consumer) override {
-    return NULL;
-  };
   bool CleanupStateForConsumer(GestureConsumer* consumer) override {
     return false;
   }