Make brokenImage() a static member of ImageResource class

Source/core/rendering/RenderImage.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Allan Sandfeld Jensen (kde@carewolf.com)
  *           (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2003, 2004, 2005, 2006, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Google Inc. All rights reserved.
  * Copyright (C) Research In Motion Limited 2011-2012. All rights reserved.
  *
@@ skipping 81 matching lines @@
 static const int maxAltTextHeight = 256;
 
 IntSize RenderImage::imageSizeForError(ImageResource* newImage) const
 {
     ASSERT_ARG(newImage, newImage);
     ASSERT_ARG(newImage, newImage->imageForRenderer(this));
 
     IntSize imageSize;
     if (newImage->willPaintBrokenImage()) {
         float deviceScaleFactor = WebCore::deviceScaleFactor(frame());
-        pair<Image*, float> brokenImageAndImageScaleFactor = newImage->brokenImage(deviceScaleFactor);
+        pair<Image*, float> brokenImageAndImageScaleFactor = ImageResource::brokenImage(deviceScaleFactor);
         imageSize = brokenImageAndImageScaleFactor.first->size();
         imageSize.scale(1 / brokenImageAndImageScaleFactor.second);
     } else
         imageSize = newImage->imageForRenderer(this)->size();
 
     // imageSize() returns 0 for the error image. We need the true size of the
     // error image, so we have to get it by grabbing image() directly.
     return IntSize(paddingWidth + imageSize.width() * style()->effectiveZoom(), paddingHeight + imageSize.height() * style()->effectiveZoom());
 }
 
@@ skipping 196 matching lines @@
             // When calculating the usable dimensions, exclude the pixels of
             // the ouline rect so the error image/alt text doesn't draw on it.
             LayoutUnit usableWidth = cWidth - 2 * borderWidth;
             LayoutUnit usableHeight = cHeight - 2 * borderWidth;
 
             RefPtr<Image> image = m_imageResource->image();
 
             if (m_imageResource->errorOccurred() && !image->isNull() && usableWidth >= image->width() && usableHeight >= image->height()) {
                 float deviceScaleFactor = WebCore::deviceScaleFactor(frame());
                 // Call brokenImage() explicitly to ensure we get the broken image icon at the appropriate resolution.
-                pair<Image*, float> brokenImageAndImageScaleFactor = m_imageResource->cachedImage()->brokenImage(deviceScaleFactor);
+                pair<Image*, float> brokenImageAndImageScaleFactor = ImageResource::brokenImage(deviceScaleFactor);
                 image = brokenImageAndImageScaleFactor.first;
                 IntSize imageSize = image->size();
                 imageSize.scale(1 / brokenImageAndImageScaleFactor.second);
                 // Center the error image, accounting for border and padding.
                 LayoutUnit centerX = (usableWidth - imageSize.width()) / 2;
                 if (centerX < 0)
                     centerX = 0;
                 LayoutUnit centerY = (usableHeight - imageSize.height()) / 2;
                 if (centerY < 0)
                     centerY = 0;
@@ skipping 256 matching lines @@
         return 0;
 
     ImageResource* cachedImage = m_imageResource->cachedImage();
     if (cachedImage && cachedImage->image() && cachedImage->image()->isSVGImage())
         return static_cast<SVGImage*>(cachedImage->image())->embeddedContentBox();
 
     return 0;
 }
 
 } // namespace WebCore