Target touches to the correct display.

ui/events/gestures/gesture_sequence.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/events/gestures/gesture_sequence.h"
 
 #include <stdlib.h>
 #include <cmath>
 
 #include "base/command_line.h"
@@ skipping 502 matching lines @@
     // finger without either a RELEASE or CANCEL in between. But let's not crash
     // in a release build.
     if (new_point->in_use()) {
       LOG(ERROR) << "Received a second press for a point: " << event.touch_id();
       new_point->ResetVelocity();
       new_point->UpdateValues(event);
       return NULL;
     }
     new_point->set_point_id(point_count_++);
     new_point->set_touch_id(event.touch_id());
+    new_point->set_source_device_id(event.source_device_id());
   }
 
   GestureState last_state = state_;
 
   // NOTE: when modifying these state transitions, also update gestures.dot
   scoped_ptr<Gestures> gestures(new Gestures());
   GesturePoint& point = GesturePointForEvent(event);
   point.UpdateValues(event);
   RecreateBoundingBox();
   flags_ = event.flags();
@@ skipping 906 matching lines @@
   // Since a timer is running, there should be a non-NULL point.
   const GesturePoint* point = GetPointByPointId(0);
   if (!ui::gestures::IsInsideManhattanSquare(point->first_touch_position(),
                                              event.location())) {
     GetLongPressTimer()->Stop();
     GetShowPressTimer()->Stop();
   }
 }
 
 }  // namespace ui