Add a means of extracting active operations from SkPicture

tools/bench_record.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkCommandLineFlags.h"
 #include "SkForceLinking.h"
 #include "SkGraphics.h"
@@ skipping 59 matching lines @@
 
 static void bench_record(SkPicture* src, const char* name, PictureFactory pictureFactory) {
     const SkMSec start = SkTime::GetMSecs();
     const int width  = src ? src->width()  : FLAGS_nullSize;
     const int height = src ? src->height() : FLAGS_nullSize;
 
     for (int i = 0; i < FLAGS_loops; i++) {
         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;
     const double msPerLoop = elapsed / (double)FLAGS_loops;
     printf("%.2g\t%s\n", msPerLoop, name);
 }
 
 int tool_main(int argc, char** argv);
 int tool_main(int argc, char** argv) {
     SkCommandLineFlags::Parse(argc, argv);
     SkAutoGraphics autoGraphics;
 
     PictureFactory pictureFactory = parse_FLAGS_bbh();
     if (pictureFactory == NULL) {
         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;
     bool failed = false;
     while (it.next(&filename)) {
         const SkString path = SkOSPath::SkPathJoin(FLAGS_skps[0], filename.c_str());
 
         SkAutoTUnref<SkStream> stream(SkStream::NewFromFile(path.c_str()));
         if (!stream) {
             SkDebugf("Could not read %s.\n", path.c_str());
             failed = true;
             continue;
         }
         SkAutoTUnref<SkPicture> src(SkPicture::CreateFromStream(stream));
         if (!src) {
             SkDebugf("Could not read %s as an SkPicture.\n", path.c_str());
             failed = true;
             continue;
         }
         bench_record(src, filename.c_str(), pictureFactory);
     }
     return failed ? 1 : 0;
 }
 
 #if !defined SK_BUILD_FOR_IOS
 int main(int argc, char * const argv[]) {
     return tool_main(argc, (char**) argv);
 }
 #endif