Getting RenderWidgetHostViewWin ready for a GestureRecognizer.

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 46a9e2be41988b1134aa4a6e1bb85ae7aebee0f0..059fdf39ef8b9d2e00d356345fc75ec1155d5d54 100644
--- a/ui/views/events/event.h
+++ b/ui/views/events/event.h
@@ -406,6 +406,15 @@ class VIEWS_EXPORT ScrollEvent : public MouseEvent {
 class VIEWS_EXPORT GestureEvent : public LocatedEvent,
                                   public ui::GestureEvent {
  public:
+  GestureEvent(ui::EventType type,
+               int x,
+               int y,
+               int flags,
+               const base::Time& time_stamp,
+               float delta_x,
+               float delta_y,
+               unsigned int touch_ids_bitfield);
+
   explicit GestureEvent(const NativeEvent& native_event);
 
   // Create a new GestureEvent which is identical to the provided model.
@@ -432,6 +441,12 @@ class VIEWS_EXPORT GestureEvent : public LocatedEvent,
   float delta_x_;
   float delta_y_;
 
+  // The set of indices of ones in the binary representation of
+  // |touch_ids_bitfield_| is the set of touch_ids associate with this gesture.
+  // This value is stored as a bitfield because the number of touch ids varies,
+  // but we currently don't need more than 32 touches at a time.
+  const unsigned int touch_ids_bitfield_;
+
   DISALLOW_COPY_AND_ASSIGN(GestureEvent);
 };