Rename scheduleLayerUpdate now that it's only used for SVG filters.

Source/core/html/HTMLPlugInElement.cpp

 /**
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Stefan Schimanski (1Stein@gmx.de)
  * Copyright (C) 2004, 2005, 2006 Apple Computer, Inc.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 465 matching lines @@
         return false;
     }
 
     if (renderer) {
         setWidget(widget);
         m_persistedPluginWidget = nullptr;
     } else if (widget != m_persistedPluginWidget) {
         m_persistedPluginWidget = widget;
     }
     document().setContainsPlugins();
-    scheduleLayerUpdate();
+    scheduleSVGFilterLayerUpdateHack();
     return true;
 }
 
 bool HTMLPlugInElement::shouldUsePlugin(const KURL& url, const String& mimeType, bool hasFallback, bool& useFallback)
 {
     // Allow other plug-ins to win over QuickTime because if the user has
     // installed a plug-in that can handle TIFF (which QuickTime can also
     // handle) they probably intended to override QT.
     if (document().frame()->page() && (mimeType == "image/tiff" || mimeType == "image/tif" || mimeType == "image/x-tiff")) {
         const PluginData* pluginData = document().frame()->page()->pluginData();
@@ skipping 62 matching lines @@
 {
     return false;
 }
 
 bool HTMLPlugInElement::useFallbackContent() const
 {
     return hasAuthorShadowRoot();
 }
 
 }