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>
 
@@ skipping 28 matching lines @@
 
   enum class PointerType {
     kUnknown,
     kMouse,
     kPen,
     kEraser,
     kTouch,
     kLastEntry = kTouch  // Must be the last entry in the list
   };
 
-  WebPointerProperties()
-      : id(0),
+  WebPointerProperties(int id_param)

[sadrul, 2017/05/01 15:42:11]

explicit

[lanwei, 2017/05/01 23:51:21]

Done.

+      : 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(int 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) {}
 
@@ skipping 28 matching lines @@
 
   PointerType pointer_type;
 
   int movement_x;
   int movement_y;
 };
 
 }  // namespace blink
 
 #endif