Chrome::client() should return a ChromeClient reference.

Source/core/rendering/svg/RenderSVGRoot.cpp

 /*
  * Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2007, 2008, 2009 Rob Buis <buis@kde.org>
  * Copyright (C) 2007 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2009 Google, Inc.
  * Copyright (C) Research In Motion Limited 2011. 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
@@ skipping 95 matching lines @@
         isPercentageIntrinsicSize = true;
         intrinsicSize = FloatSize(intrinsicWidthAttribute.percent(), intrinsicHeightAttribute.percent());
     }
 }
 
 bool RenderSVGRoot::isEmbeddedThroughSVGImage() const
 {
     if (!node())
         return false;
 
-    Frame* frame = node()->document()->frame();
-    if (!frame)
-        return false;
-
     // Test whether we're embedded through an img.
-    if (!frame->page())
-        return false;
-
-    ChromeClient* chromeClient = frame->page()->chrome().client();
-    if (!chromeClient || !chromeClient->isSVGImageChromeClient())
-        return false;
-
-    return true;
+    if (Page* page = node()->document()->page())
+        return page->chrome().client().isSVGImageChromeClient();
+    return false;
 }
 
 bool RenderSVGRoot::isEmbeddedThroughFrameContainingSVGDocument() const
 {
     if (!node())
         return false;
 
     Frame* frame = node()->document()->frame();
     if (!frame)
         return false;
@@ skipping 343 matching lines @@
 {
     RenderObject* svgRoot = resource->parent();
     while (svgRoot && !svgRoot->isSVGRoot())
         svgRoot = svgRoot->parent();
     if (!svgRoot)
         return;
     toRenderSVGRoot(svgRoot)->m_resourcesNeedingToInvalidateClients.add(resource);
 }
 
 }