Add Linux ARM builder to main waterfall

scripts/slave/recipes/chromium_trybot.py

 # Copyright 2013 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 infra.libs.infra_types import freeze
 
 DEPS = [
   'bot_update',
   'chromium',
   'chromium_android',
@@ skipping 20 matching lines @@
     'builders': {
       'linux_blink_rel_ng': {
         'mastername': 'chromium.webkit',
         'buildername': 'WebKit Linux',
       },
     },
   },
   'tryserver.chromium.linux': {
     'builders': {
       'linux_arm_compile': {
-        'mastername': 'chromium.fyi',
+        'mastername': 'chromium.linux',
         'buildername': 'Linux ARM',
       },
       'android_arm64_dbg_recipe': {
         'mastername': 'chromium.linux',
         'buildername': 'Android Arm64 Builder (dbg)',
       },
       'android_clang_dbg_recipe': {
         'mastername': 'chromium.linux',
         'buildername': 'Android Clang Builder (dbg)',
       },
@@ skipping 937 matching lines @@
 
   yield (
     api.test('swarming_paths') +
     api.properties.tryserver(
       mastername='tryserver.chromium.linux',
       buildername='linux_chromium_rel_ng',
       path_config='swarming',
     ) +
     api.platform.name('linux')
   )