Add perf tests for starting Chrome with URL

tools/perf/measurements/session_restore_with_url.py

Index: tools/perf/measurements/session_restore_with_url.py
diff --git a/tools/perf/measurements/session_restore_with_url.py b/tools/perf/measurements/session_restore_with_url.py
new file mode 100644
index 0000000000000000000000000000000000000000..81244c969a29b8e33533f58d8e7e70e382bc10ba
--- /dev/null
+++ b/tools/perf/measurements/session_restore_with_url.py
@@ -0,0 +1,15 @@
+# Copyright 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 measurements import session_restore
+
+
+class SessionRestoreWithUrl(session_restore.SessionRestore):
+
+  def __init__(self):
+    super(SessionRestoreWithUrl, self).__init__()
+
+  def CanRunForPage(self, page):
+    # Run for every page in the page set that has a startup url.
+    return page.hasattr('startup_url')