Revert 124071 - Gestures are now possible using touch events with any ids

ui/aura/gestures/gesture_sequence.h

Index: ui/aura/gestures/gesture_sequence.h
===================================================================
--- ui/aura/gestures/gesture_sequence.h	(revision 124450)
+++ ui/aura/gestures/gesture_sequence.h	(working copy)
@@ -55,12 +55,8 @@
 
   GesturePoint& GesturePointForEvent(const TouchEvent& event);
 
-  // Do a linear scan through points_ to find the GesturePoint
-  // with id |point_id|.
-  GesturePoint* GetPointByPointId(int point_id);
+  // Functions to be called to add GestureEvents, after succesful recognition.
 
-  // Functions to be called to add GestureEvents, after successful recognition.
-
   // Tap gestures.
   void AppendTapDownGestureEvent(const GesturePoint& point, Gestures* gestures);
   void AppendClickGestureEvent(const GesturePoint& point, Gestures* gestures);