touch: Cleanup touch-event mode switching on windows.

content/browser/renderer_host/render_widget_host_impl.h

Index: content/browser/renderer_host/render_widget_host_impl.h
diff --git a/content/browser/renderer_host/render_widget_host_impl.h b/content/browser/renderer_host/render_widget_host_impl.h
index b544b93fbe1274dd12b521ab0f758a1bf4a7de7f..e1d4cc565a6daa56ce88d973ee1d1756ee71f266 100644
--- a/content/browser/renderer_host/render_widget_host_impl.h
+++ b/content/browser/renderer_host/render_widget_host_impl.h
@@ -638,7 +638,7 @@ class CONTENT_EXPORT RenderWidgetHostImpl : virtual public RenderWidgetHost,
   // Called on OnMsgInputEventAck() to process a touch event ack message.
   // This can result in a gesture event being generated and sent back to the
   // renderer.
-  void ProcessTouchAck(WebKit::WebInputEvent::Type type, bool processed);
+  void ProcessTouchAck(bool processed);
 
   // Called when there is a new auto resize (using a post to avoid a stack
   // which may get in recursive loops).