Add pointer id to the WebMouseEvent's constructors

third_party/WebKit/public/platform/WebMouseWheelEvent.h

Index: third_party/WebKit/public/platform/WebMouseWheelEvent.h
diff --git a/third_party/WebKit/public/platform/WebMouseWheelEvent.h b/third_party/WebKit/public/platform/WebMouseWheelEvent.h
index a0e59af028ab7645a853e5afad4d54b6b85781e6..8514470c0fba569164f8179ccad80c6c46d2e965 100644
--- a/third_party/WebKit/public/platform/WebMouseWheelEvent.h
+++ b/third_party/WebKit/public/platform/WebMouseWheelEvent.h
@@ -57,7 +57,8 @@ class WebMouseWheelEvent : public WebMouseEvent {
       : WebMouseEvent(sizeof(WebMouseWheelEvent),
                       type,
                       modifiers,
-                      time_stamp_seconds),
+                      time_stamp_seconds,
+                      0),

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

Shouldn't this be the default mouse-pointer-id?

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

Done.

         delta_x(0.0f),
         delta_y(0.0f),
         wheel_ticks_x(0.0f),
@@ -73,7 +74,7 @@ class WebMouseWheelEvent : public WebMouseEvent {
         dispatch_type(kBlocking) {}
 
   WebMouseWheelEvent()
-      : WebMouseEvent(sizeof(WebMouseWheelEvent)),
+      : WebMouseEvent(sizeof(WebMouseWheelEvent), 0),
         delta_x(0.0f),
         delta_y(0.0f),
         wheel_ticks_x(0.0f),