Make android/x64 bot build and run tests in release.

tools/mb/mb_config.pyl

 # 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.
 
 {
   # This is a map of buildbot master names -> buildbot builder names ->
   # config names (where each config name is a key in the 'configs' dict,
   # below). MB uses this dict to look up which config to use for a given bot.
   'masters': {
     'chromeos.chrome': {
@@ skipping 679 matching lines @@
 
     'android_clang_tot_asan': [
       'android_without_codecs', 'clang_tot', 'asan', 'shared', 'debug', 'minimal_symbols',
     ],
 
     'android_clang_tot_dbg': [
       'android_without_codecs', 'clang_tot', 'shared', 'debug',
     ],
 
     'android_clang_tot_x64': [
-      'android_without_codecs', 'clang_tot', 'shared', 'x64',
+      'android_without_codecs', 'clang_tot', 'shared', 'x64', 'release',
+      'dcheck_always_on',
     ],
 
     'android_cronet_data_reduction_proxy_release_bot_minimal_symbols_arm_no_neon': [
       'android', 'cronet', 'data_reduction_proxy', 'release_bot', 'minimal_symbols', 'arm_no_neon',
     ],
 
     'android_cronet_debug_static_bot_arm64': [
       'android', 'cronet', 'debug_static_bot', 'arm64',
     ],
 
@@ skipping 1098 matching lines @@
 
     'x64': {
       'gn_args': 'target_cpu="x64"',
     },
 
     'x86': {
       'gn_args': 'target_cpu="x86"',
     },
   },
 }