Use DrawingRecorder::canUseCachedDrawing

Source/core/paint/RenderDrawingRecorder.h

Index: Source/core/paint/RenderDrawingRecorder.h
diff --git a/Source/core/paint/RenderDrawingRecorder.h b/Source/core/paint/RenderDrawingRecorder.h
index 5acd0fd08bfaa61c9846311ea8fe08e4c25a186d..9bbd559140ff4a5fc39b5af6b98356eee2b2a9d2 100644
--- a/Source/core/paint/RenderDrawingRecorder.h
+++ b/Source/core/paint/RenderDrawingRecorder.h
@@ -17,14 +17,16 @@ class RenderObject;
 
 class RenderDrawingRecorder {
 public:
-    explicit RenderDrawingRecorder(GraphicsContext*, const RenderObject*, PaintPhase, const FloatRect&);
+    explicit RenderDrawingRecorder(GraphicsContext*, const RenderObject&, PaintPhase, const FloatRect&);
 
     ~RenderDrawingRecorder();
 
+    bool canUseCachedDrawing() const { return m_drawingRecorder.canUseCachedDrawing(); }
+
 private:
-    DrawingRecorder drawingRecorder;
+    DrawingRecorder m_drawingRecorder;
 #ifndef NDEBUG
-    const RenderObject* m_renderer;
+    const RenderObject& m_renderer;
 #endif
 };