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..751949acb064b092ec43ba0e9b04fa935512432e
--- /dev/null
+++ b/tools/perf/measurements/session_restore_with_url.py
@@ -0,0 +1,19 @@
+# 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):
+    # The session restore tests ignore the contents of the page set, so only

[jeremy, 2013/12/17 11:29:44]

nit s/so/so they/

[aberent, 2013/12/17 17:31:27]

Actually changing the function to check that the page has a startup url, hence
rewriting the comment completely.

+    # run for the first page in the set. This test, however, uses the
+    # set_startup_url attribute of pages in the page set, which may differ
+    # between the pages so it makes sense to run it for every page in the page

[jeremy, 2013/12/17 11:29:44]

nit: How about changing this to something like -

pages. The test needs to be run for every page in the set to pick up the
individual attributes.

[aberent, 2013/12/17 17:31:27]

See above

+    # set.
+    return True