Force off clang for GPU FYI release bots.

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 .pyl, or "Python Literal", file. You can treat it just like a
 # .json file, with the following exceptions:
 # * all keys must be quoted (use single quotes, please);
 # * comments are allowed, using '#' syntax; and
 # * trailing commas are allowed.
 
@@ skipping 1216 matching lines @@
 
     'gpu_tests_deqp_gles_debug_trybot': [
       'gpu_fyi_tests', 'debug_trybot',
     ],
 
     'gpu_tests_deqp_gles_debug_trybot_x86': [
       'gpu_fyi_tests', 'debug_trybot', 'x86',
     ],
 
     'gpu_tests_deqp_gles_release_trybot': [
-      'gpu_fyi_tests', 'release_trybot',
+      # TODO(thakis): Remove no_clang once https://crbug.com/727437 is fixed.
+      'gpu_fyi_tests', 'release_trybot', 'no_clang',
     ],
 
     'gpu_tests_deqp_gles_release_trybot_x86': [
-      'gpu_fyi_tests', 'release_trybot', 'x86',
+      # TODO(thakis): Remove no_clang once https://crbug.com/727437 is fixed.
+      'gpu_fyi_tests', 'release_trybot', 'x86', 'no_clang',
     ],
 
     'gpu_tests_debug_trybot': [
       'gpu_tests', 'debug_trybot',
     ],
 
     'gpu_tests_debug_trybot_x86': [
       'gpu_tests', 'debug_trybot', 'x86',
     ],
 
@@ skipping 336 matching lines @@
 
     'clang_tot': {
       'gn_args': 'llvm_force_head_revision=true clang_use_chrome_plugins=false',
       'mixins': ['clang'],
     },
 
     'clang': {
       'gn_args': 'is_clang=true',
     },
 
+    'no_clang': {
+      'gn_args': 'is_clang=false',
+    },
+
     'cronet': {
       'gn_args': ('disable_file_support=true disable_ftp_support=true '
                   'enable_websockets=false use_platform_icu_alternatives=true '
                   'use_partition_alloc=false'),
     },
 
     'cros_chrome_sdk': {
       # This is used so that the cros chrome_sdk (simplechrome) builders
       # can manage the list of GN args in their .ebuild
       # files and just pass through the desired arguments, hence not
@@ skipping 281 matching lines @@
 
     'x64': {
       'gn_args': 'target_cpu="x64"',
     },
 
     'x86': {
       'gn_args': 'target_cpu="x86"',
     },
   },
 }