Fix import order with isort tool.

tools/telemetry/telemetry/core/backends/chrome/websocket_unittest.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 base64
 import BaseHTTPServer
 import hashlib
 import socket
 import threading
 import unittest
 
-
 from telemetry.core.backends.chrome import websocket
 
 
 # Minimal handler for a local websocket server.
 class _FakeWebSocketHandler(BaseHTTPServer.BaseHTTPRequestHandler):
   def do_GET(self):
     key = self.headers.getheader('Sec-WebSocket-Key')
 
     value = key + '258EAFA5-E914-47DA-95CA-C5AB0DC85B11'
     hashed = base64.encodestring(hashlib.sha1(value).digest()).strip().lower()
@@ skipping 23 matching lines @@
         ws.sock.getsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR), 0)
 
     threading.Thread(target=httpd.handle_request).start()
     ws = websocket.create_connection(
         ws_url,
         sockopt=[(socket.IPPROTO_TCP, socket.TCP_NODELAY, 1)])
     self.assertNotEquals(
         ws.sock.getsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR), 0)
     self.assertNotEquals(
         ws.sock.getsockopt(socket.IPPROTO_TCP, socket.TCP_NODELAY), 0)