Avoid RefPtr churn

third_party/WebKit/Source/core/layout/LayoutImageResource.cpp

 /*
  * Copyright (C) 1999 Lars Knoll <knoll@kde.org>
  * Copyright (C) 1999 Antti Koivisto <koivisto@kde.org>
  * Copyright (C) 2000 Dirk Mueller <mueller@kde.org>
  * Copyright (C) 2006 Allan Sandfeld Jensen <kde@carewolf.com>
  * Copyright (C) 2006 Samuel Weinig <sam.weinig@gmail.com>
  * Copyright (C) 2003, 2004, 2005, 2006, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Google Inc. All rights reserved.
  * Copyright (C) 2010 Patrick Gansterer <paroga@paroga.com>
  *
@@ skipping 84 matching lines @@
     if (!m_cachedImage)
         return LayoutSize();
     LayoutSize size = m_cachedImage->imageSizeForLayoutObject(m_layoutObject, multiplier);
     if (m_layoutObject && m_layoutObject->isLayoutImage() && size.width() && size.height())
         size.scale(toLayoutImage(m_layoutObject)->imageDevicePixelRatio());
     return size;
 }
 
 PassRefPtr<Image> LayoutImageResource::image(const IntSize& containerSize, float zoom) const
 {
-    RefPtr<Image> image = m_cachedImage ? m_cachedImage->image() : Image::nullImage();
-    if (image->isSVGImage()) {
-        KURL url;
-        SVGImage* svgImage = toSVGImage(image.get());
-        Node* node = m_layoutObject->node();
-        if (node && node->isElementNode()) {
-            const AtomicString& urlString = toElement(node)->imageSourceURL();
-            url = node->document().completeURL(urlString);
-        }
-        return SVGImageForContainer::create(svgImage, containerSize, zoom, url);
+    if (!m_cachedImage)
+        return Image::nullImage();
+
+    if (!m_cachedImage->image()->isSVGImage())
+        return m_cachedImage->image();
+
+    KURL url;
+    SVGImage* svgImage = toSVGImage(m_cachedImage->image());
+    Node* node = m_layoutObject->node();
+    if (node && node->isElementNode()) {
+        const AtomicString& urlString = toElement(node)->imageSourceURL();
+        url = node->document().completeURL(urlString);
     }
-    return image;
+    return SVGImageForContainer::create(svgImage, containerSize, zoom, url);
 }
 
 bool LayoutImageResource::maybeAnimated() const
 {
     Image* image = m_cachedImage ? m_cachedImage->image() : Image::nullImage();
     return image->maybeAnimated();
 }
 
 } // namespace blink