Use scroll-boundary-behavior to control overscroll-refresh/glow on android.

third_party/WebKit/public/web/WebViewClient.h

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 226 matching lines @@
   // refactor WebView to not inherit from WebWidget.
   // WebWidgetClient overrides.
   void CloseWidgetSoon() override {}
   void ConvertViewportToWindow(WebRect* rect) override {}
   void ConvertWindowToViewport(WebFloatRect* rect) override {}
   void DidHandleGestureEvent(const WebGestureEvent& event,
                              bool event_cancelled) override {}
   void DidOverscroll(const WebFloatSize& overscroll_delta,
                      const WebFloatSize& accumulated_overscroll,
                      const WebFloatPoint& position_in_viewport,
-                     const WebFloatSize& velocity_in_viewport) override {}
+                     const WebFloatSize& velocity_in_viewport,
+                     const WebScrollBoundaryBehavior& behavior) override {}
   void HasTouchEventHandlers(bool) override {}
   WebLayerTreeView* InitializeLayerTreeView() override { return nullptr; }
   WebScreenInfo GetScreenInfo() override { return WebScreenInfo(); }
   void SetTouchAction(WebTouchAction touch_action) override {}
   void ShowUnhandledTapUIIfNeeded(const WebPoint& tapped_position,
                                   const WebNode& tapped_node,
                                   bool page_changed) override {}
   void Show(WebNavigationPolicy) override {}
   virtual WebWidgetClient* WidgetClient() { return this; }
 
  protected:
 };
 
 }  // namespace blink
 
 #endif