Initial views touchui Gesture Recognizer support

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 640e9918cf2fe27e7a47fe3f111fffb64b8ca347..28301142d383ad2842f72e1a617401177dd04f67 100644
--- a/ui/views/events/event.h
+++ b/ui/views/events/event.h
@@ -62,6 +62,10 @@ class VIEWS_EXPORT Event {
 #endif
   ui::EventType type() const { return type_; }
   const base::Time& time_stamp() const { return time_stamp_; }
+
+  // Required for Gesture testing purposes.
+  void set_time_stamp(base::Time time_stamp) { time_stamp_ = time_stamp; }
+
   int flags() const { return flags_; }
   void set_flags(int flags) { flags_ = flags; }
 
@@ -419,6 +423,39 @@ class VIEWS_EXPORT ScrollEvent : public MouseEvent {
   DISALLOW_COPY_AND_ASSIGN(ScrollEvent);
 };
 
+////////////////////////////////////////////////////////////////////////////////
+// GestureEvent class
+//
+////////////////////////////////////////////////////////////////////////////////
+class VIEWS_EXPORT GestureEvent : public LocatedEvent {
+ public:
+  GestureEvent(ui::EventType type,
+               int x,
+               int y,
+               int flags,
+               base::Time time_stamp,
+               float delta_x,
+               float delta_y);
+
+  // Create a new GestureEvent which is identical to the provided model.
+  // If source / target views are provided, the model location will be converted
+  // from |source| coordinate system to |target| coordinate system.
+  GestureEvent(const GestureEvent& model, View* source, View* target);
+
+  float delta_x() const { return delta_x_; }
+  float delta_y() const { return delta_y_; }
+
+ private:
+  friend class internal::RootView;
+
+  GestureEvent(const GestureEvent& model, View* root);
+
+  float delta_x_;
+  float delta_y_;
+
+  DISALLOW_COPY_AND_ASSIGN(GestureEvent);
+};
+
 }  // namespace views
 
 #endif  // UI_VIEWS_EVENTS_EVENT_H_