Set the unique_event_id when converting from TouchEvent to WebTouchEvent

ui/events/gesture_detection/motion_event_buffer.cc

 // Copyright 2014 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/gesture_detection/motion_event_buffer.h"
 
 #include "base/trace_event/trace_event.h"
 #include "ui/events/gesture_detection/motion_event_generic.h"
 
 namespace ui {
@@ skipping 113 matching lines @@
   const base::TimeTicks time1 = event1.GetEventTime();
   DCHECK(time0 < time1);
   DCHECK(time0 <= resample_time);
 
   const float alpha = (resample_time - time0).InMillisecondsF() /
                       (time1 - time0).InMillisecondsF();
 
   scoped_ptr<MotionEventGeneric> event;
   const size_t pointer_count = event0.GetPointerCount();
   DCHECK_EQ(pointer_count, event1.GetPointerCount());
+  LOG(ERROR) << "  ResampleMotionEvent pointer_count  " << pointer_count;

[tdresser, 2015/04/16 17:33:34]

Remove log.

[lanwei, 2015/04/20 19:58:59]

Done.

   for (size_t event0_i = 0; event0_i < pointer_count; ++event0_i) {
     int event1_i = event1.FindPointerIndexOfId(event0.GetPointerId(event0_i));
     DCHECK_NE(event1_i, -1);
     PointerProperties pointer = ResamplePointer(
         event0, event1, event0_i, static_cast<size_t>(event1_i), alpha);
 
     if (event0_i == 0) {
       event.reset(new MotionEventGeneric(
           MotionEvent::ACTION_MOVE, resample_time, pointer));
     } else {
       event->PushPointer(pointer);
     }
   }
 
   DCHECK(event);
-  event->set_id(event0.GetId());
   event->set_button_state(event0.GetButtonState());
   return event.Pass();
 }
 
 // Synthesize a compound MotionEventGeneric event from a sequence of events.
 // Events must be in non-decreasing (time) order.
 scoped_ptr<MotionEventGeneric> ConsumeSamples(MotionEventVector events) {
   DCHECK(!events.empty());
   scoped_ptr<MotionEventGeneric> event(events.back());
   for (size_t i = 0; i + 1 < events.size(); ++i)
@@ skipping 172 matching lines @@
 
 void MotionEventBuffer::FlushWithoutResampling(MotionEventVector events) {
   last_extrapolated_event_time_ = base::TimeTicks();
   if (events.empty())
     return;
 
   client_->ForwardMotionEvent(*ConsumeSamples(events.Pass()));
 }
 
 }  // namespace ui