Use DrawingRecorder::canUseCachedDrawing

Source/core/paint/DrawingRecorderTest.cpp

Index: Source/core/paint/DrawingRecorderTest.cpp
diff --git a/Source/core/paint/DrawingRecorderTest.cpp b/Source/core/paint/DrawingRecorderTest.cpp
index 8f25f5db9e2a06cfaa9a50afe35782bacfb96f6d..b284f1f967fbdc0a0f45f8cbe08a072ae076339c 100644
--- a/Source/core/paint/DrawingRecorderTest.cpp
+++ b/Source/core/paint/DrawingRecorderTest.cpp
@@ -41,12 +41,14 @@ private:
 
 void drawNothing(GraphicsContext* context, RenderView* renderer, PaintPhase phase, const FloatRect& bound)
 {
-    RenderDrawingRecorder drawingRecorder(context, renderer, phase, bound);
+    RenderDrawingRecorder drawingRecorder(context, *renderer, phase, bound);
 }
 
 void drawRect(GraphicsContext* context, RenderView* renderer, PaintPhase phase, const FloatRect& bound)
 {
-    RenderDrawingRecorder drawingRecorder(context, renderer, phase, bound);
+    RenderDrawingRecorder drawingRecorder(context, *renderer, phase, bound);
+    if (drawingRecorder.canUseCachedDrawing())
+        return;
     IntRect rect(0, 0, 10, 10);
     context->drawRect(rect);
 }