Gestures are now possible using touch events with any ids

ui/aura/gestures/gesture_point.h

Index: ui/aura/gestures/gesture_point.h
diff --git a/ui/aura/gestures/gesture_point.h b/ui/aura/gestures/gesture_point.h
index a3a46dbc0473ba4c7bed1439d668382ca030cc37..950bbb5ab5133bcfcebc8cc2d53ef99d2c4a4da6 100644
--- a/ui/aura/gestures/gesture_point.h
+++ b/ui/aura/gestures/gesture_point.h
@@ -53,8 +53,11 @@ class GesturePoint {
   double last_touch_time() const { return last_touch_time_; }
   const gfx::Point& last_touch_position() const { return last_touch_position_; }
 
-  void set_touch_id(unsigned int touch_id) { touch_id_ = touch_id; }
-  const unsigned int touch_id() const { return touch_id_; }
+  void set_point_id(int point_id) { point_id_ = point_id; }

[rjkroege, 2012/02/23 19:39:45]

can you add some comments saying what these are for

[tdresser, 2012/02/23 20:13:07]

Done.

+  const int point_id() const { return point_id_; }
+
+  void use() { in_use_ = true; }
+  const bool in_use() const { return in_use_; }
 
   double x_delta() const {
     return last_touch_position_.x() - first_touch_position_.x();
@@ -87,7 +90,8 @@ class GesturePoint {
 
   VelocityCalculator velocity_calculator_;
 
-  unsigned int touch_id_;
+  bool in_use_;

[rjkroege, 2012/02/23 19:39:45]

do we need both the bool and the point_id? positive point_id == in_use, negative
point_id == not in use?

[tdresser, 2012/02/23 20:13:07]

Done.

+  int point_id_;
   DISALLOW_COPY_AND_ASSIGN(GesturePoint);
 };