Add new site isolation trybot.

masters/master.tryserver.chromium.linux/slaves.cfg

 # -*- python -*-
 # ex: set syntax=python:
 # Copyright 2014 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.
 
 # See master.experimental/slaves.cfg for documentation.
 
 def linux():
   linux_arm_testers = [9]
@@ skipping 65 matching lines @@
    {
       'master': 'TryServerChromiumLinux',
       'os': 'linux',
       'version': 'precise',
       'bits': '64',
       'builder': 'linux_clang_tsan',
       'hostname': 'slave496-c4',
    }
   )
 
+  result.append(
+   {
+      'master': 'TryServerChromiumLinux',
+      'os': 'linux',
+      'version': 'precise',
+      'bits': '64',
+      'builder': 'linux_site_isolation',
+      'hostname': 'slave568-c4',
+   }
+  )
+
   result.extend(
     {
       'master': 'TryServerChromiumLinux',
       'os': 'linux',
       'version': 'quantal',
       'bits': '32',
       'builder': 'linux_arm_tester',
       'hostname': 'build%d-a4' % i,
     } for i in linux_arm_testers
   )
@@ skipping 87 matching lines @@
       'os': 'linux',
       'version': 'precise',
       'bits': '64',
     } for i in range(520, 540)
   ]
 
   return compile_slaves + test_slaves + aosp_slaves
 
 
 slaves = linux() + android()