Add pointer id to the WebMouseEvent's constructors

third_party/WebKit/public/platform/WebPointerProperties.h

 // Copyright (c) 2015 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.
 
 #ifndef WebPointerProperties_h
 #define WebPointerProperties_h
 
 #include <cstdint>
 #include <limits>
 
 namespace blink {
 
+using PointerId = int32_t;
+
 // This class encapsulates the properties that are common between mouse and
 // pointer events and touch points as we transition towards the unified pointer
 // event model.
 // TODO(e_hakkinen): Replace WebTouchEvent with WebPointerEvent, remove
 // WebTouchEvent and WebTouchPoint and merge this into WebPointerEvent.
 class WebPointerProperties {
  public:
   enum class Button {
     kNoButton = -1,
     kLeft,
@@ skipping 16 matching lines @@
 
   enum class PointerType {
     kUnknown,
     kMouse,
     kPen,
     kEraser,
     kTouch,
     kLastEntry = kTouch  // Must be the last entry in the list
   };
 
-  WebPointerProperties()
-      : id(0),
+  explicit WebPointerProperties(PointerId id_param)
+      : id(id_param),
         force(std::numeric_limits<float>::quiet_NaN()),
         tilt_x(0),
         tilt_y(0),
         tangential_pressure(0.0f),
         twist(0),
         button(Button::kNoButton),
         pointer_type(PointerType::kUnknown),
         movement_x(0),
         movement_y(0) {}
 
-  WebPointerProperties(Button button_param, PointerType pointer_type_param)
-      : id(0),
+  WebPointerProperties(PointerId id_param,
+                       Button button_param,
+                       PointerType pointer_type_param)
+      : id(id_param),
         force(std::numeric_limits<float>::quiet_NaN()),
         tilt_x(0),
         tilt_y(0),
         tangential_pressure(0.0f),
         twist(0),
         button(button_param),
         pointer_type(pointer_type_param),
         movement_x(0),
         movement_y(0) {}
 
-  int id;
+  PointerId id;
 
   // The valid range is [0,1], with NaN meaning pressure is not supported by
   // the input device.
   float force;
 
   // Tilt of a pen stylus from surface normal as plane angles in degrees,
   // Values lie in [-90,90]. A positive tiltX is to the right and a positive
   // tiltY is towards the user.
   int tilt_x;
   int tilt_y;
@@ skipping 17 matching lines @@
 
   PointerType pointer_type;
 
   int movement_x;
   int movement_y;
 };
 
 }  // namespace blink
 
 #endif