Add gesture target fuzzing to views

ui/views/events/event.h

Index: ui/views/events/event.h
diff --git a/ui/views/events/event.h b/ui/views/events/event.h
index 433d5cfd74c9ece7d8cd5e507db4a95ea383d53b..e64ad817e6ad4eacd706e1e9f59d07ba5a70f54e 100644
--- a/ui/views/events/event.h
+++ b/ui/views/events/event.h
@@ -438,6 +438,7 @@ class VIEWS_EXPORT GestureEvent : public LocatedEvent,
 
  private:
   friend class internal::RootView;
+  friend class GestureEventForTest;
 
   GestureEvent(const GestureEvent& model, View* root);
 
@@ -452,6 +453,9 @@ class VIEWS_EXPORT GestureEvent : public LocatedEvent,
 class VIEWS_EXPORT GestureEventForTest : public GestureEvent {
  public:
   GestureEventForTest(ui::EventType type, int x, int y, int flags);
+  void set_details(const ui::GestureEventDetails details) {
+    details_ = details;
+  }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(GestureEventForTest);