input: Make the OverscrollController less intrusive, and some code cleanup.

content/browser/renderer_host/overscroll_controller.h

Index: content/browser/renderer_host/overscroll_controller.h
diff --git a/content/browser/renderer_host/overscroll_controller.h b/content/browser/renderer_host/overscroll_controller.h
index 9c8282ed60a1e55b3d8c897cfa174a36388d6f28..2b6dc9612f8b7c6f0d6d9029fb3283e2a297dca3 100644
--- a/content/browser/renderer_host/overscroll_controller.h
+++ b/content/browser/renderer_host/overscroll_controller.h
@@ -106,10 +106,6 @@ class OverscrollController {
   // appropriate).
   void SetOverscrollMode(OverscrollMode new_mode);
 
-  // Returns whether the input event should be forwarded to the
-  // RenderWidgetHost.
-  bool ShouldForwardToHost(const WebKit::WebInputEvent& event) const;
-
   // The RenderWidgetHost that owns this overscroll controller.
   RenderWidgetHostImpl* render_widget_host_;