Add a no-op measurement

tools/perf/measurements/no_op.py

Index: tools/perf/measurements/no_op.py
diff --git a/tools/perf/measurements/no_op.py b/tools/perf/measurements/no_op.py
new file mode 100644
index 0000000000000000000000000000000000000000..148185efa3b869526637d38fbffc93e17092ad8a
--- /dev/null
+++ b/tools/perf/measurements/no_op.py
@@ -0,0 +1,21 @@
+# 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.page import page_measurement
+
+class NoOp(page_measurement.PageMeasurement):
+  def __init__(self):
+    super(NoOp, self).__init__('no_op')
+
+  def CanRunForPage(self, page):
+    return hasattr(page, 'no_op')

[tonyg, 2013/12/03 02:46:44]

Does this prevent it from working with most page sets? I feel like this should
be able to run for all pages.

+
+  def WillRunAction(self, page, tab, action):
+    pass
+
+  def DidRunAction(self, page, tab, action):

[tonyg, 2013/12/03 02:46:44]

Are Will/DidRunAction really necessary?

+    pass
+
+  def MeasurePage(self, page, tab, results):
+    pass