Convert chart-json to Histograms.

tracing/bin/chartjson2histograms

Index: tracing/bin/chartjson2histograms
diff --git a/tracing/bin/chartjson2histograms b/tracing/bin/chartjson2histograms
new file mode 100755
index 0000000000000000000000000000000000000000..cdf76b82efd35967fe3801a33c52712f231806d0
--- /dev/null
+++ b/tracing/bin/chartjson2histograms
@@ -0,0 +1,35 @@
+#!/usr/bin/env python

[eakuefner, 2016/11/18 21:37:11]

no need

+# Copyright 2016 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import argparse
+import json
+import os
+import sys
+
+tracing_path = os.path.abspath(os.path.join(os.path.dirname(__file__),
+                               '..'))
+sys.path.append(tracing_path)
+from tracing.value import convert_chart_json
+
+
+def Main(argv):
+  parser = argparse.ArgumentParser(
+      description='Compare samples.')
+  parser.add_argument('chart_json', type=str, help='(input)')
+  parser.add_argument('histogram_json', type=str, help='(input/output)')
+  args = parser.parse_args(argv[1:])
+
+  vinn_result = convert_chart_json.ConvertChartJson(args.chart_json)
+
+  if vinn_result.returncode == 0:
+    histograms = json.loads(vinn_result.stdout)
+    if os.path.exists(args.histogram_json):
+      histograms.extend(json.load(file(args.histogram_json, 'r')))
+    json.dump(histograms, file(args.histogram_json, 'w'))
+
+  return vinn_result.returncode
+
+if __name__ == '__main__':
+  sys.exit(Main(sys.argv))