Tag recording picture nesting bench as nonrendering.

bench/PictureNestingBench.cpp

Index: bench/PictureNestingBench.cpp
diff --git a/bench/PictureNestingBench.cpp b/bench/PictureNestingBench.cpp
index f1adb6084026d9703cae83a502425a43cbb1137c..c2848833b747a8d8afaaf09117addeb75129fe04 100644
--- a/bench/PictureNestingBench.cpp
+++ b/bench/PictureNestingBench.cpp
@@ -99,7 +99,11 @@ public:
     }
 
 protected:
-    virtual void onDraw(const int loops, SkCanvas* canvas) {
+    virtual bool isSuitableFor(Backend backend) {
+        return backend == kNonRendering_Backend;
+    }
+
+    virtual void onDraw(const int loops, SkCanvas*) {
         SkIPoint canvasSize = onGetSize();
         SkPictureRecorder recorder;