Use refs for GraphicsContext

third_party/WebKit/Source/core/paint/SVGClipPainter.h

Index: third_party/WebKit/Source/core/paint/SVGClipPainter.h
diff --git a/third_party/WebKit/Source/core/paint/SVGClipPainter.h b/third_party/WebKit/Source/core/paint/SVGClipPainter.h
index 5fb2b3afa3b5ed9482abbff3406df072e07df155..c511bc23a2765ae5abcf4a5f7e398a416e71140a 100644
--- a/third_party/WebKit/Source/core/paint/SVGClipPainter.h
+++ b/third_party/WebKit/Source/core/paint/SVGClipPainter.h
@@ -29,11 +29,11 @@ public:
     // FIXME: Filters are also stateful resources that could benefit from having their state managed
     //        on the caller stack instead of the current hashmap. We should look at refactoring these
     //        into a general interface that can be shared.
-    bool prepareEffect(const LayoutObject&, const FloatRect&, const FloatRect&, GraphicsContext*, ClipperState&);
-    void finishEffect(const LayoutObject&, GraphicsContext*, ClipperState&);
+    bool prepareEffect(const LayoutObject&, const FloatRect&, const FloatRect&, GraphicsContext&, ClipperState&);
+    void finishEffect(const LayoutObject&, GraphicsContext&, ClipperState&);
 
 private:
-    void drawClipMaskContent(GraphicsContext*, const LayoutObject&, const FloatRect& targetBoundingBox, const FloatRect& targetPaintInvalidationRect);
+    void drawClipMaskContent(GraphicsContext&, const LayoutObject&, const FloatRect& targetBoundingBox, const FloatRect& targetPaintInvalidationRect);
 
     LayoutSVGResourceClipper& m_clip;
 };