Add pointer id to the WebMouseEvent's constructors

ui/events/blink/web_input_event_builders_win.cc

 // Copyright 2016 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/blink/web_input_event_builders_win.h"
 
 #include "ui/display/win/screen_win.h"
 #include "ui/events/blink/blink_event_util.h"
 #include "ui/events/event_utils.h"
 
@@ skipping 149 matching lines @@
   if (wparam & MK_LBUTTON)
     modifiers |= WebInputEvent::kLeftButtonDown;
   if (wparam & MK_MBUTTON)
     modifiers |= WebInputEvent::kMiddleButtonDown;
   if (wparam & MK_RBUTTON)
     modifiers |= WebInputEvent::kRightButtonDown;
 
   WebMouseEvent result(type, modifiers, time_stamp);
   result.pointer_type = pointer_type;
   result.button = button;
-  result.id = ui::MouseEvent::kMousePointerId;
 
   // set position fields:
   result.SetPositionInWidget(static_cast<short>(LOWORD(lparam)),
                              static_cast<short>(HIWORD(lparam)));
 
   POINT global_point = {result.PositionInWidget().x,
                         result.PositionInWidget().y};
   ClientToScreen(hwnd, &global_point);
 
   // We need to convert the global point back to DIP before using it.
@@ skipping 178 matching lines @@
     result.wheel_ticks_x = wheel_delta;
   } else {
     result.delta_y = scroll_delta;
     result.wheel_ticks_y = wheel_delta;
   }
 
   return result;
 }
 
 }  // namespace ui