Add SVG as a picture supported mime type

Source/core/html/HTMLImageElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * 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 246 matching lines @@
     // also heavily discussed by Hixie on bugzilla
     const AtomicString& alt = fastGetAttribute(altAttr);
     if (!alt.isNull())
         return alt;
     // fall back to title attribute
     return fastGetAttribute(titleAttr);
 }
 
 static bool supportedImageType(const String& type)
 {
-    return MIMETypeRegistry::isSupportedImageResourceMIMEType(type);
+    return MIMETypeRegistry::isSupportedImagePrefixedMIMEType(type);
 }
 
 // http://picture.responsiveimages.org/#update-source-set
 ImageCandidate HTMLImageElement::findBestFitImageFromPictureParent()
 {
     ASSERT(isMainThread());
     Node* parent = parentNode();
     if (!parent || !isHTMLPictureElement(*parent))
         return ImageCandidate();
     for (Node* child = parent->firstChild(); child; child = child->nextSibling()) {
@@ skipping 354 matching lines @@
     }
     imageLoader().updateFromElement(behavior);
 }
 
 const KURL& HTMLImageElement::sourceURL() const
 {
     return cachedImage()->response().url();
 }
 
 }