NOT FOR LANDING Experiment with allocating SVGImageForContainer on demand

Source/core/style/StyleFetchedImage.h

Index: Source/core/style/StyleFetchedImage.h
diff --git a/Source/core/style/StyleFetchedImage.h b/Source/core/style/StyleFetchedImage.h
index 4f6ecf2c0f9646d45c6c98424f8156f112c6f5b6..dfb16bd2baa15b7ca645817cb49f1270dff189bc 100644
--- a/Source/core/style/StyleFetchedImage.h
+++ b/Source/core/style/StyleFetchedImage.h
@@ -36,9 +36,9 @@ class ImageResource;
 class StyleFetchedImage final : public StyleImage, private ImageResourceClient {
     WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED(StyleFetchedImage);
 public:
-    static PassRefPtrWillBeRawPtr<StyleFetchedImage> create(ImageResource* image, Document* document)
+    static PassRefPtrWillBeRawPtr<StyleFetchedImage> create(ImageResource* image, Document* document, const KURL& urlWithFragment)
     {
-        return adoptRefWillBeNoop(new StyleFetchedImage(image, document));
+        return adoptRefWillBeNoop(new StyleFetchedImage(image, document, urlWithFragment));
     }
     ~StyleFetchedImage() override;
 
@@ -54,21 +54,22 @@ public:
     bool imageHasRelativeHeight() const override;
     void computeIntrinsicDimensions(const LayoutObject*, Length& intrinsicWidth, Length& intrinsicHeight, FloatSize& intrinsicRatio) override;
     bool usesImageContainerSize() const override;
-    void setContainerSizeForLayoutObject(const LayoutObject*, const IntSize&, float) override;
     void addClient(LayoutObject*) override;
     void removeClient(LayoutObject*) override;
     void notifyFinished(Resource*) override;
     PassRefPtr<Image> image(LayoutObject*, const IntSize&) const override;
     bool knownToBeOpaque(const LayoutObject*) const override;
     ImageResource* cachedImage() const override { return m_image.get(); }
+    KURL url() const override { return m_urlWithFragment; }
 
     DECLARE_VIRTUAL_TRACE();
 
 private:
-    StyleFetchedImage(ImageResource*, Document*);
+    StyleFetchedImage(ImageResource*, Document*, const KURL&);
 
     ResourcePtr<ImageResource> m_image;
     RawPtrWillBeMember<Document> m_document;
+    KURL m_urlWithFragment; // TODO(davve): Just keep the fragment?
 };
 
 DEFINE_STYLE_IMAGE_TYPE_CASTS(StyleFetchedImage, isImageResource());