Count usage of #svgView(...) and plain SVG <view> targets

third_party/WebKit/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 683 matching lines @@
             markForLayoutAndParentResourceInvalidation(layoutObject);
         return;
     }
 
     if (fragmentIdentifier.startsWith("svgView(")) {
         if (!view)
             view = currentView(); // Create the SVGViewSpec.
 
         view->inheritViewAttributesFromElement(this);
 
-        if (view->parseViewSpec(fragmentIdentifier))
+        if (view->parseViewSpec(fragmentIdentifier)) {
+            UseCounter::count(document(), UseCounter::SVGSVGElementFragmentSVGView);
             m_useCurrentView = true;
-        else
+        } else {
             view->reset();
+        }
 
         if (layoutObject && (hadUseCurrentView || m_useCurrentView))
             markForLayoutAndParentResourceInvalidation(layoutObject);
         return;
     }
 
     // Spec: If the SVG fragment identifier addresses a 'view' element within an SVG document (e.g., MyDrawing.svg#MyView
     // or MyDrawing.svg#xpointer(id('MyView'))) then the closest ancestor 'svg' element is displayed in the viewport.
     // Any view specification attributes included on the given 'view' element override the corresponding view specification
     // attributes on the closest ancestor 'svg' element.
@@ skipping 20 matching lines @@
         markForLayoutAndParentResourceInvalidation(layoutObject);
 
     // FIXME: We need to decide which <svg> to focus on, and zoom to it.
     // FIXME: We need to actually "highlight" the viewTarget(s).
 }
 
 void SVGSVGElement::inheritViewAttributes(SVGViewElement* viewElement)
 {
     SVGViewSpec* view = currentView();
     m_useCurrentView = true;
+    UseCounter::count(document(), UseCounter::SVGSVGElementFragmentSVGViewElement);
     view->inheritViewAttributesFromElement(this);
     view->inheritViewAttributesFromElement(viewElement);
 }
 
 void SVGSVGElement::finishParsingChildren()
 {
     SVGGraphicsElement::finishParsingChildren();
 
     // The outermost SVGSVGElement SVGLoad event is fired through Document::dispatchWindowLoadEvent.
     if (isOutermostSVGSVGElement())
@@ skipping 11 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