Remove XP and Vista bots from chromium.win and chromium.webkit waterfalls.

scripts/slave/recipe_modules/chromium_tests/chromium_webkit.py

 # 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.
 
 import copy
 
 from . import chromium_chromiumos
 from . import steps
 
 SPEC = copy.deepcopy(chromium_chromiumos.SPEC)
@@ skipping 18 matching lines @@
       # to Windows builds (so that start_crash_service step works).
       'crash_service',
     ],
     'bot_type': 'builder',
     'testing': {
       'platform': 'win',
     },
     'enable_swarming': True,
     'use_isolate': True,
   },
-  'WebKit XP': {
-    'chromium_config': 'chromium',
-    'chromium_apply_config': ['mb'],
-    'gclient_config': 'chromium',
-    'gclient_apply_config': ['blink_or_chromium'],
-    'chromium_config_kwargs': {
-      'BUILD_CONFIG': 'Release',
-      'TARGET_BITS': 32,
-    },
-    'bot_type': 'tester',
-    'parent_buildername': 'WebKit Win Builder',
-    'test_generators': [
-      steps.generate_gtest,
-      steps.generate_script,
-    ],
-    'tests': [
-      steps.BlinkTest(),
-    ],
-    'testing': {
-      'platform': 'win',
-    },
-    'enable_swarming': True,
-    'use_isolate': True,
-  },
   'WebKit Win7': {
     'chromium_config': 'chromium',
     'chromium_apply_config': ['mb'],
     'gclient_config': 'chromium',
     'gclient_apply_config': ['blink_or_chromium'],
     'chromium_config_kwargs': {
       'BUILD_CONFIG': 'Release',
       'TARGET_BITS': 32,
     },
     'bot_type': 'tester',
@@ skipping 808 matching lines @@
           'src/third_party/WebKit/LayoutTests/OilpanExpectations',
       ]),
     ],
     'testing': {
       'platform': 'linux',
     },
     'enable_swarming': True,
     'use_isolate': True,
   },
 })