Perf tests for Plugin Power Saver take 2.

tools/perf/page_sets/throttled_plugins.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 telemetry.page import page
+from telemetry.page import page_set
+
+
+class ThrottledPluginsPageSet(page_set.PageSet):
+  def __init__(self):
+    super(ThrottledPluginsPageSet, self).__init__(
+        user_agent_type='desktop',
+        archive_data_file='data/throttled_plugins.json',
+        bucket=page_set.PUBLIC_BUCKET)
+    urls_with_throttled_plugins = [
+        'http://cnn.com',
+        'http://techcrunch.com',
+        'http://wsj.com',
+        'http://youtube.com'
+    ]
+    for url in urls_with_throttled_plugins:
+      self.AddUserStory(page.Page(url, page_set=self))