Copy adb_profile_chrome to catapult

systrace/profile_chrome/ddms_controller_unittest.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.
+
+import os
+
+from profile_chrome import controllers_unittest
+from profile_chrome import ddms_controller
+
+
+class DdmsControllerTest(controllers_unittest.BaseControllerTest):
+  def testTracing(self):
+    controller = ddms_controller.DdmsController(self.device, self.package_info)
+
+    interval = 1
+    try:
+      controller.StartTracing(interval)
+    finally:
+      controller.StopTracing()
+
+    result = controller.PullTrace()
+    try:
+      with open(result) as f:
+        self.assertTrue(f.read().startswith('*version'))
+    finally:
+      os.remove(result)