Increase the websocket timeout in Chrome OS.

telemetry/telemetry/internal/backends/chrome/chrome_browser_backend.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 logging
 import pprint
 import shlex
 import sys
 
 from telemetry.core import exceptions
+from telemetry.core import util
 from telemetry import decorators
 from telemetry.internal.backends import browser_backend
 from telemetry.internal.backends.chrome import extension_backend
 from telemetry.internal.backends.chrome import system_info_backend
 from telemetry.internal.backends.chrome import tab_list_backend
 from telemetry.internal.backends.chrome_inspector import devtools_client_backend
 from telemetry.internal.browser import user_agent
 from telemetry.internal.browser import web_contents
 from telemetry.testing import options_for_unittests
 
@@ skipping 241 matching lines @@
       self._devtools_client = None
 
   @property
   def supports_system_info(self):
     return self.GetSystemInfo() != None
 
   def GetSystemInfo(self):
     if self._system_info_backend is None:
       self._system_info_backend = system_info_backend.SystemInfoBackend(
           self._port)
+    # TODO(crbug.com/706336): Remove this condional branch once crbug.com/704024
+    # is fixed.
+    if util.IsRunningOnCrosDevice():
+      return self._system_info_backend.GetSystemInfo(timeout=30)
     return self._system_info_backend.GetSystemInfo()
 
   @property
   def supports_memory_dumping(self):
     return True
 
   def DumpMemory(self, timeout=web_contents.DEFAULT_WEB_CONTENTS_TIMEOUT):
     return self.devtools_client.DumpMemory(timeout)
 
   @property
@@ skipping 14 matching lines @@
   def supports_cpu_metrics(self):
     return True
 
   @property
   def supports_memory_metrics(self):
     return True
 
   @property
   def supports_power_metrics(self):
     return True