Prepare SVGImage for the default sizing algorithm

third_party/WebKit/Source/core/svg/graphics/SVGImage.h

Index: third_party/WebKit/Source/core/svg/graphics/SVGImage.h
diff --git a/third_party/WebKit/Source/core/svg/graphics/SVGImage.h b/third_party/WebKit/Source/core/svg/graphics/SVGImage.h
index c2009f217fc06e7d7a7b924d8382471624aad106..721bd236c05729fccdded4fc2cbdc97192813be2 100644
--- a/third_party/WebKit/Source/core/svg/graphics/SVGImage.h
+++ b/third_party/WebKit/Source/core/svg/graphics/SVGImage.h
@@ -55,7 +55,7 @@ public:
 
     bool isSVGImage() const override { return true; }
     bool isTextureBacked() override { return false; }
-    IntSize size() const override { return m_intrinsicSize; }
+    IntSize size() const override { return m_concreteObjectSize; }
 
     bool currentFrameHasSingleSecurityOrigin() const override;
 
@@ -90,6 +90,7 @@ private:
 
     String filenameExtension() const override;
 
+    FloatSize calculateConcreteObjectSize(const FloatSize&) const;
     IntSize containerSize() const;
     bool usesContainerSize() const override { return true; }
     void computeIntrinsicDimensions(Length& intrinsicWidth, Length& intrinsicHeight, FloatSize& intrinsicRatio) override;
@@ -114,7 +115,19 @@ private:
 
     OwnPtrWillBePersistent<SVGImageChromeClient> m_chromeClient;
     OwnPtrWillBePersistent<Page> m_page;
-    IntSize m_intrinsicSize;
+
+    // "The concrete object size is the result of combining an
+    // object’s intrinsic dimensions and specified size with the
+    // default object size of the context it’s used in, producing a
+    // rectangle with a definite width and height."
+    //
+    // https://drafts.csswg.org/css-images-3/#concrete-object-size
+    //
+    // Note: For SVGImage there are no specified size
+    // constraints. Such constraints are handled by the layout
+    // machinery in LayoutReplaced. An image has only intrinsic size,
+    // aspect ratio and default object size to consider.
+    IntSize m_concreteObjectSize;
 };
 
 DEFINE_IMAGE_TYPE_CASTS(SVGImage);