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

content/browser/renderer_host/input/input_router.h

Index: content/browser/renderer_host/input/input_router.h
diff --git a/content/browser/renderer_host/input/input_router.h b/content/browser/renderer_host/input/input_router.h
index 2d8a4c6dd5d668b43008e61dfaddece56d028810..2809b3bf5718a63482db6e590ef961401e5271a4 100644
--- a/content/browser/renderer_host/input/input_router.h
+++ b/content/browser/renderer_host/input/input_router.h
@@ -60,9 +60,6 @@ class InputRouter : public IPC::Listener {
   // |gesture_event| to the router.
   virtual bool ShouldForwardGestureEvent(
       const GestureEventWithLatencyInfo& gesture_event) const = 0;
-
-  // Returns |true| if the router has any queued or in-flight gesture events.
-  virtual bool HasQueuedGestureEvents() const = 0;
 };
 
 }  // namespace content