Add a Telemetry based cold startup test.

tools/perf/benchmarks/startup.py

+# Copyright (c) 2013 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.
+from telemetry import test
+
+from measurements import startup
+
+
+class StartupColdBlankPage(test.Test):
+  test = startup.Startup
+  page_set = 'page_sets/blank_page.json'
+  options = {'cold': True,
+             'pageset_repeat_iters': 5}
+
+
+class StartupWarmBlankPage(test.Test):
+  test = startup.Startup
+  page_set = 'page_sets/blank_page.json'
+  options = {'warm': True,
+             'pageset_repeat_iters': 20}