Replace chromeperf80 with build91-b1 in master.chromium.fyi

masters/master.chromium.fyi/slaves.cfg

 # -*- python -*-
 # ex: set syntax=python:
 
 # Copyright (c) 2012 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.
 
 
@@ skipping 116 matching lines @@
     'master': 'ChromiumFYI',
     'builder': ['Android Tests (trial)(dbg)', 'Android Tests (x86 emulator)'],
     'hostname': 'build64-b1',
     'os': 'linux',
     'version': 'precise',
     'bits': '64',
   },
   {
     'master': 'ChromiumFYI',
     'builder': 'Android ChromeDriver Tests (dbg)',
-    'hostname': 'chromeperf80',
+    'hostname': 'build91-b1',
     'os': 'linux',
     'version': 'precise',
     'bits': '64',
   },
   {
     'master': 'ChromiumFYI',
     'builder': 'Android Cloud Tests',
     'hostname': 'slave51-c1',
     'os': 'linux',
     'version': 'trusty',
@@ skipping 539 matching lines @@
   },
   {
     'master': 'ChromiumFYI',
     'builder': 'Linux Kitchen (annotated_run)',
     'hostname': 'slave74-c1',
     'os': 'linux',
     'version': 'precise',
     'bits': '64',
   },
 ]