Add computation of saveLayer information to RecordingBench

bench/RecordingBench.cpp

Index: bench/RecordingBench.cpp
diff --git a/bench/RecordingBench.cpp b/bench/RecordingBench.cpp
index 76d557d48ba49ea25e02d4f08aa1c1f8b140212e..fe857393231e3c2827d5aac3c8cc47aae18e76e1 100644
--- a/bench/RecordingBench.cpp
+++ b/bench/RecordingBench.cpp
@@ -35,7 +35,8 @@ void RecordingBench::onDraw(const int loops, SkCanvas*) {
 
     for (int i = 0; i < loops; i++) {
         SkPictureRecorder recorder;
-        fSrc->playback(recorder.beginRecording(w, h, fUseBBH ? &factory : NULL));
+        fSrc->playback(recorder.beginRecording(w, h, fUseBBH ? &factory : NULL,
+                                               SkPictureRecorder::kComputeSaveLayerInfo_RecordFlag));
         SkDELETE(recorder.endRecording());
     }
 }