[telemetry] Sort imports in Telemetry and its dependents.

tools/perf/profile_creators/history_profile_extender.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 multiprocessing
+import os
 import tempfile
-import os
 
 from profile_creators import fast_navigation_profile_extender
 
 
 class HistoryProfileExtender(
     fast_navigation_profile_extender.FastNavigationProfileExtender):
   """This extender navigates Chrome to a large number of URIs pointing to local
   files. It continues running until the history DB becomes full."""
   _HISTORY_DB_MAX_SIZE_IN_MB = 10
 
@@ skipping 64 matching lines @@
     """Whether the history DB has reached its maximum size."""
     history_db_path = os.path.join(self.profile_path, "Default", "History")
     stat_info = os.stat(history_db_path)
     size = stat_info.st_size
 
     max_size_threshold = 0.95
     bytes_in_megabyte = 2**20
     max_size = (bytes_in_megabyte *
         HistoryProfileExtender._HISTORY_DB_MAX_SIZE_IN_MB * max_size_threshold)
     return size > max_size