Add a means of extracting active operations from SkPicture

tools/bench_record.cpp

Index: tools/bench_record.cpp
===================================================================
--- tools/bench_record.cpp	(revision 13850)
+++ tools/bench_record.cpp	(working copy)
@@ -77,8 +77,12 @@
         int recordingFlags = FLAGS_flags;
         SkAutoTUnref<SkPicture> dst(pictureFactory(width, height, &recordingFlags));
         SkCanvas* canvas = dst->beginRecording(width, height, recordingFlags);
-        if (src) src->draw(canvas);
-        if (FLAGS_endRecording) dst->endRecording();
+        if (NULL != src) {
+            src->draw(canvas);
+        }
+        if (FLAGS_endRecording) {
+            dst->endRecording();
+        }
     }
 
     const SkMSec elapsed = SkTime::GetMSecs() - start;
@@ -96,7 +100,9 @@
         return 1;
     }
     bench_record(NULL, "NULL", pictureFactory);
-    if (FLAGS_skps.isEmpty()) return 0;
+    if (FLAGS_skps.isEmpty()) {
+        return 0;
+    }
 
     SkOSFile::Iter it(FLAGS_skps[0], ".skp");
     SkString filename;