[telemetry] Sort imports in Telemetry and its dependents.

tools/perf/benchmarks/dromaeo.py

 # 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.
 
 import math
 import os
 
-from metrics import power
 from telemetry import benchmark
 from telemetry import page as page_module
 from telemetry.page import page_set
 from telemetry.page import page_test
 from telemetry.value import scalar
 
+from metrics import power
+
 
 class _DromaeoMeasurement(page_test.PageTest):
   def __init__(self):
     super(_DromaeoMeasurement, self).__init__()
     self._power_metric = None
 
   def CustomizeBrowserOptions(self, options):
     power.PowerMetric.CustomizeBrowserOptions(options)
 
   def WillStartBrowser(self, platform):
@@ skipping 290 matching lines @@
 
   Tests traversing a DOM structure using the Prototype JavaScript Library.
   """
   tag = 'cssqueryjquery'
   query_param = 'cssquery-jquery'
 
   @classmethod
   def Name(cls):
     return 'dromaeo.cssqueryjquery'