Move "zoomAndPan enabled" logic from SVGDocumentExtensions to SVGSVGElement

Source/core/svg/SVGSVGElement.cpp

 /*
  * Copyright (C) 2004, 2005, 2006 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2010 Rob Buis <buis@kde.org>
  * Copyright (C) 2007 Apple Inc. All rights reserved.
  * Copyright (C) 2014 Google, 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 191 matching lines @@
     m_translation->setValue(point);
     updateCurrentTranslate();
 }
 
 void SVGSVGElement::updateCurrentTranslate()
 {
     if (LayoutObject* object = renderer())
         object->setNeedsLayoutAndFullPaintInvalidation();
 }
 
+bool SVGSVGElement::zoomAndPanEnabled() const
+{
+    const SVGZoomAndPan* currentViewSpec = this;
+    if (m_useCurrentView)
+        currentViewSpec = m_viewSpec.get();
+    return currentViewSpec && currentViewSpec->zoomAndPan() == SVGZoomAndPanMagnify;
+}
+
 void SVGSVGElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
 {
     if (!nearestViewportElement()) {
         bool setListener = true;
 
         // Only handle events if we're the outermost <svg> element
         if (name == HTMLNames::onunloadAttr)
             document().setWindowAttributeEventListener(EventTypeNames::unload, createAttributeEventListener(document().frame(), name, value, eventParameterName()));
         else if (name == HTMLNames::onresizeAttr)
             document().setWindowAttributeEventListener(EventTypeNames::resize, createAttributeEventListener(document().frame(), name, value, eventParameterName()));
@@ skipping 563 matching lines @@
     visitor->trace(m_width);
     visitor->trace(m_height);
     visitor->trace(m_translation);
     visitor->trace(m_timeContainer);
     visitor->trace(m_viewSpec);
     SVGGraphicsElement::trace(visitor);
     SVGFitToViewBox::trace(visitor);
 }
 
 } // namespace blink