Remove ScopedVector from ui/events/.

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 73e3cdc99cc68198836d7ab269502f7a10669561..d3036c719c1627663478d8006a2aa5fbad1379f5 100644
--- a/ui/events/gestures/gesture_recognizer_impl_mac.cc
+++ b/ui/events/gestures/gesture_recognizer_impl_mac.cc
@@ -5,6 +5,7 @@
 #include <stdint.h>
 
 #include "base/macros.h"
+#include "ui/events/event.h"
 #include "ui/events/gestures/gesture_recognizer.h"
 
 namespace ui {
@@ -24,10 +25,10 @@ class GestureRecognizerImplMac : public GestureRecognizer {
     return false;
   }
 
-  Gestures* AckTouchEvent(uint32_t unique_event_id,
-                          ui::EventResult result,
-                          GestureConsumer* consumer) override {
-    return NULL;
+  Gestures AckTouchEvent(uint32_t unique_event_id,
+                         ui::EventResult result,
+                         GestureConsumer* consumer) override {
+    return {};
   }
   bool CleanupStateForConsumer(GestureConsumer* consumer) override {
     return false;