Remove canScroll from WebMouseWheelEvent as it is unused now.

content/renderer/input/render_widget_input_handler.cc

Index: content/renderer/input/render_widget_input_handler.cc
diff --git a/content/renderer/input/render_widget_input_handler.cc b/content/renderer/input/render_widget_input_handler.cc
index 7a427303a4524558049836dcab19d3dc0ec1b451..37d31388861bf7e1d942588e3001d9ed0778b682 100644
--- a/content/renderer/input/render_widget_input_handler.cc
+++ b/content/renderer/input/render_widget_input_handler.cc
@@ -389,19 +389,9 @@ void RenderWidgetInputHandler::HandleInputEvent(
 
   // Send mouse wheel events and their disposition to the compositor thread, so

[tdresser, 2016/06/10 18:06:46]

Update comment - not longer mouse wheel events.

nit: Let's pluralized disposition, while we're here.

[dtapuska, 2016/06/10 19:11:17]

Done.

   // that they can be used to produce the elastic overscroll effect on Mac.
-  if (input_event.type == WebInputEvent::MouseWheel) {
-    const WebMouseWheelEvent& wheel_event =
-        static_cast<const WebMouseWheelEvent&>(input_event);
-    if (wheel_event.canScroll) {
-      delegate_->ObserveWheelEventAndResult(
-          wheel_event,
-          event_overscroll ? event_overscroll->latest_overscroll_delta
-                           : gfx::Vector2dF(),
-          processed != WebInputEventResult::NotHandled);
-    }
-  } else if (input_event.type == WebInputEvent::GestureScrollBegin ||
-             input_event.type == WebInputEvent::GestureScrollEnd ||
-             input_event.type == WebInputEvent::GestureScrollUpdate) {
+  if (input_event.type == WebInputEvent::GestureScrollBegin ||
+      input_event.type == WebInputEvent::GestureScrollEnd ||
+      input_event.type == WebInputEvent::GestureScrollUpdate) {
     const WebGestureEvent& gesture_event =
         static_cast<const WebGestureEvent&>(input_event);
     if (gesture_event.sourceDevice == blink::WebGestureDeviceTouchpad) {