Unify content transformation calculations for SVG clip paths

Source/core/layout/svg/LayoutSVGResourceClipper.h

Index: Source/core/layout/svg/LayoutSVGResourceClipper.h
diff --git a/Source/core/layout/svg/LayoutSVGResourceClipper.h b/Source/core/layout/svg/LayoutSVGResourceClipper.h
index 492484c4e4d7d25bdd2aa6e123df3533953e6571..99b0235448c8d6baad13f4db69f5376c71b66086 100644
--- a/Source/core/layout/svg/LayoutSVGResourceClipper.h
+++ b/Source/core/layout/svg/LayoutSVGResourceClipper.h
@@ -37,6 +37,8 @@ public:
     virtual void removeAllClientsFromCache(bool markForInvalidation = true) override;
     virtual void removeClientFromCache(LayoutObject*, bool markForInvalidation = true) override;
 
+    AffineTransform calculateContentTransformation(const LayoutObject*, const FloatRect& targetBoundingBox);
+
     FloatRect resourceBoundingBox(const LayoutObject*);
 
     static const LayoutSVGResourceType s_resourceType = ClipperResourceType;
@@ -46,14 +48,14 @@ public:
 
     SVGUnitTypes::SVGUnitType clipPathUnits() const { return toSVGClipPathElement(element())->clipPathUnits()->currentValue()->enumValue(); }
 
-    bool tryPathOnlyClipping(const LayoutObject&, GraphicsContext*, const AffineTransform&, const FloatRect&);
-    PassRefPtr<const SkPicture> createContentPicture(AffineTransform&, const FloatRect&, GraphicsContext*);
+    bool tryPathOnlyClipping(const LayoutObject&, GraphicsContext*, const AffineTransform& contentTransformation);
+    PassRefPtr<const SkPicture> createContentPicture(const AffineTransform& contentTransformation, GraphicsContext*);
 
     bool hasCycle() { return m_inClipExpansion; }
     void beginClipExpansion() { ASSERT(!m_inClipExpansion); m_inClipExpansion = true; }
     void endClipExpansion() { ASSERT(m_inClipExpansion); m_inClipExpansion = false; }
 private:
-    void calculateClipContentPaintInvalidationRect();
+    void calculateClipContentPaintInvalidationRect(const LayoutObject*);
 
     RefPtr<const SkPicture> m_clipContentPicture;
     FloatRect m_clipBoundaries;