[Android] Add a flag to disable the pull-to-refresh effect

content/renderer/input/input_event_filter.h

Index: content/renderer/input/input_event_filter.h
diff --git a/content/renderer/input/input_event_filter.h b/content/renderer/input/input_event_filter.h
index e7982f6ffd4085885d81bc3d747cca8ba9c94ace..19eac67f8e5a7b34b600263603668599403fb6dd 100644
--- a/content/renderer/input/input_event_filter.h
+++ b/content/renderer/input/input_event_filter.h
@@ -93,9 +93,6 @@ class CONTENT_EXPORT InputEventFilter : public InputHandlerManagerClient,
   // Indicates the routing_ids for which input events should be filtered.
   std::set<int> routes_;
 
-  // Specifies whether overscroll notifications are forwarded to the host.
-  bool overscroll_notifications_enabled_;
-
   // Used to intercept overscroll notifications while an event is being
   // dispatched.  If the event causes overscroll, the overscroll metadata can be
   // bundled in the event ack, saving an IPC.  Note that we must continue