[telemetry] Sort imports in Telemetry and its dependents.

content/test/gpu/gpu_tests/trace_test.py

 # Copyright (c) 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 page_sets
 import trace_test_expectations
-import page_sets
 
 from telemetry import benchmark
-from telemetry.page import page_test
 from telemetry.core.platform import tracing_category_filter
 from telemetry.core.platform import tracing_options
+from telemetry.page import page_test
 from telemetry.timeline import model as model_module
 
 TOPLEVEL_GL_CATEGORY = 'gpu_toplevel'
 TOPLEVEL_SERVICE_CATEGORY = 'disabled-by-default-gpu.service'
 TOPLEVEL_DEVICE_CATEGORY = 'disabled-by-default-gpu.device'
 TOPLEVEL_CATEGORIES = [TOPLEVEL_SERVICE_CATEGORY, TOPLEVEL_DEVICE_CATEGORY]
 
 test_harness_script = r"""
   var domAutomationController = {};
 
@@ skipping 78 matching lines @@
   """Tests GPU Device traces show up on devices that support it."""
   test = _DeviceTraceValidator
   name = 'DeviceTraceTest'
 
   @classmethod
   def Name(cls):
     return 'device_trace_test'
 
   def CreateExpectations(self):
     return trace_test_expectations.DeviceTraceTestExpectations()