[telemetry] Sort imports in Telemetry and its dependents.

tools/perf/benchmarks/indexeddb_perf.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.
 
 """Runs Chromium's IndexedDB performance test. These test:
 
 Databases:
   create/delete
 Keys:
   create/delete
 Indexes:
   create/delete
 Data access:
   Random read/write
   Read cache
 Cursors:
   Read & random writes
   Walking multiple
   Seeking.
 """
 
 import json
 import os
 
-from metrics import memory
-from metrics import power
 from telemetry import benchmark
+from telemetry.core import util
 from telemetry import page as page_module
-from telemetry.core import util
 from telemetry.page import page_set
 from telemetry.page import page_test
 from telemetry.value import scalar
 
+from metrics import memory
+from metrics import power
+
+
 class _IndexedDbMeasurement(page_test.PageTest):
   def __init__(self):
     super(_IndexedDbMeasurement, self).__init__()
     self._memory_metric = None
     self._power_metric = None
 
   def WillStartBrowser(self, platform):
     """Initialize metrics once right before the browser has been launched."""
     self._power_metric = power.PowerMetric(platform)
 
@@ skipping 42 matching lines @@
   @classmethod
   def Name(cls):
     return 'indexeddb_perf'
 
   def CreatePageSet(self, options):
     indexeddb_dir = os.path.join(util.GetChromiumSrcDir(), 'chrome', 'test',
                                  'data', 'indexeddb')
     ps = page_set.PageSet(file_path=indexeddb_dir)
     ps.AddUserStory(page_module.Page('file://perf_test.html', ps, ps.base_dir))
     return ps