[Telemetry] Remove session_restore's use of PageTest.CanRunForPage.

tools/perf/page_sets/session_restore.py

+# Copyright 2015 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 page_sets import typical_25
+from telemetry.page import page as page_module
+from telemetry.page import page_set as page_set_module
+
+
+class SessionRestorePageSet(page_set_module.PageSet):
+  """A special case of the typical_25 for the session_restore benchmarks.
+
+  The session_restore benchmarks -- before running the test -- use the
+  typical_25 page set to build a profile that has multiple tabs open.
+  Then, they use the session restore behavior to restore that state while
+  starting with a dummy URL.
+
+  This class is only to be used by the session_restore benchmark. This
+  class is here because archive_data_file -- shared from typical_25 --
+  is relative to this directory.
+  """
+
+  def __init__(self):
+    super(SessionRestorePageSet, self).__init__(
+        user_agent_type=typical_25.USER_AGENT_TYPE,
+        archive_data_file=typical_25.ARCHIVE_DATA_FILE,
+        bucket=typical_25.PAGE_SET_BUCKET)
+
+    # The session_restore measurement never navigates to this url.
+    # However, the url is needed to make sure Web Page Replay starts.
+    # The url listed here needs exist in the WPR archive.
+    self.AddUserStory(page_module.Page(
+        'http://www.nick.com/games', self))