Windows 10 64-bit try server configuration.

scripts/slave/recipe_modules/chromium_tests/trybots.py

 # Copyright 2015 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.
 
 from recipe_engine.types import freeze
 
 
 def simple_bot(bot_id, analyze_mode=None):
   return {
     'bot_ids': [bot_id],
@@ skipping 546 matching lines @@
             'buildername': 'GPU Win Builder',
             'tester': 'Win7 Release (NVIDIA)',
           },
           {
             'mastername': 'chromium.gpu',
             'buildername': 'GPU Win Builder',
             'tester': 'Win7 Release (ATI)',
           },
         ],
       },
-      'win10_chromium_rel_ng': simple_bot({
+      'win10_chromium_x64_rel_ng': simple_bot({
         'mastername': 'chromium.fyi',
         'buildername': 'Win Builder',
-        'tester': 'Win10 Tests (1)',
+        'tester': 'Win10 Tests x64',
       }),
       'win_chromium_rel_ng_exp': simple_bot({
         'mastername': 'chromium.win',
         'buildername': 'Win Builder',
         'tester': 'Win7 Tests (1)',
       }),
       'win_chromium_compile_dbg_ng': simple_bot({
         'mastername': 'chromium.win',
         'buildername': 'Win Builder (dbg)',
       }, analyze_mode='compile'),
@@ skipping 71 matching lines @@
         'mastername': 'client.v8.fyi',
         'buildername': 'V8 Linux GN',
       }),
       'v8_android_chromium_gn_dbg': simple_bot({
         'mastername': 'client.v8.fyi',
         'buildername': 'V8 Android GN (dbg)',
       }),
     },
   },
 })