[telemetry] Sort imports in Telemetry and its dependents.

tools/perf/benchmarks/session_restore.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 os
 import tempfile
 
+from telemetry import benchmark
+
 from measurements import session_restore
 import page_sets
 from profile_creators import profile_generator
 from profile_creators import small_profile_creator
-from telemetry import benchmark
 
 
 class _SessionRestoreTypical25(benchmark.Benchmark):
   """Base Benchmark class for session restore benchmarks.
 
   A cold start means none of the Chromium files are in the disk cache.
   A warm start assumes the OS has already cached much of Chromium's content.
   For warm tests, you should repeat the page set to ensure it's cached.
 
   Use Typical25PageSet to match what the SmallProfileCreator uses.
@@ skipping 68 matching lines @@
 
   The first result is discarded.
   """
   tag = 'warm'
   options = {'pageset_repeat': 20}
 
   @classmethod
   def Name(cls):
     return 'session_restore.warm.typical_25'