touch: Cleanup touch-event mode switching on windows.

content/port/browser/render_widget_host_view_port.h

Index: content/port/browser/render_widget_host_view_port.h
diff --git a/content/port/browser/render_widget_host_view_port.h b/content/port/browser/render_widget_host_view_port.h
index 1689e41bab6882c77a72a20ecff1ffd62b057577..070b47d6db2a87590c3d32567f5b280cb69ebcad 100644
--- a/content/port/browser/render_widget_host_view_port.h
+++ b/content/port/browser/render_widget_host_view_port.h
@@ -259,8 +259,7 @@ class CONTENT_EXPORT RenderWidgetHostViewPort : public RenderWidgetHostView {
   // prevent-default on a dispatched touch event, the touch events are queued in
   // the GestureRecognizer until invocation of ProcessTouchAck releases it to be
   // processed (when |processed| is false) or ignored (when |processed| is true)
-  virtual void ProcessTouchAck(WebKit::WebInputEvent::Type type,
-                               bool processed) = 0;
+  virtual void ProcessTouchAck(bool processed) = 0;
 
   // Asks the view to create a smooth scroll gesture that will be used to
   // simulate a user-initiated scroll.