2 files changed, 6 insertions, 0 deletions
diff --git a/ui/base/events/event.cc b/ui/base/events/event.cc
index 6a44c33..5086822 100644
--- a/ui/base/events/event.cc
+++ b/ui/base/events/event.cc
@@ -275,6 +275,11 @@ MouseWheelEvent::MouseWheelEvent(const ScrollEvent& scroll_event)
   set_type(ET_MOUSEWHEEL);
 }
 
+MouseWheelEvent::MouseWheelEvent(const MouseEvent& mouse_event, int offset)
+    : MouseEvent(mouse_event), offset_(offset) {
+  DCHECK(type() == ET_MOUSEWHEEL);
+}
+
 #if defined(OS_WIN)
 // This value matches windows WHEEL_DELTA.
 // static
diff --git a/ui/base/events/event.h b/ui/base/events/event.h
index 4f2da00..61cf81b 100644
--- a/ui/base/events/event.h
+++ b/ui/base/events/event.h
@@ -369,6 +369,7 @@ class UI_EXPORT MouseWheelEvent : public MouseEvent {
 
   explicit MouseWheelEvent(const base::NativeEvent& native_event);
   explicit MouseWheelEvent(const ScrollEvent& scroll_event);
+  MouseWheelEvent(const MouseEvent& mouse_event, int offset);
 
   template <class T>
   MouseWheelEvent(const MouseWheelEvent& model,