Add GN (the build tool) to the chromium.linux buildbots and try jobs

masters/master.chromium.linux/master_linux_cfg.py

 # Copyright (c) 2012 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 buildbot.scheduler import Triggerable
 from buildbot.schedulers.basic import SingleBranchScheduler
 
 from master.factory import annotator_factory
 
 m_annotator = annotator_factory.AnnotatorFactory()
 
 def Update(_config, active_master, c):
   c['schedulers'].extend([
       SingleBranchScheduler(name='linux_src',
                             branch='src',
                             treeStableTimer=60,
                             builderNames=[
           'Linux Builder',
           'Linux GTK Builder',
           'Linux Builder (dbg)(32)',
           'Linux Builder (dbg)',
           'Linux Clang (dbg)',
+          'Linux GN (dbg)',
       ]),
       Triggerable(name='linux_rel_trigger', builderNames=[
           'Linux Tests',
           'Linux Sync',
       ]),
       Triggerable(name='linux_gtk_trigger', builderNames=[
           'Linux GTK Tests',
       ]),
       Triggerable(name='linux_dbg_32_trigger', builderNames=[
           'Linux Tests (dbg)(1)(32)',
@@ skipping 13 matching lines @@
     {'name': 'Linux Sync'},
     {'name': 'Linux GTK Builder', 'triggers': ['linux_gtk_trigger']},
     {'name': 'Linux GTK Tests'},
     {'name': 'Linux Builder (dbg)(32)', 'triggers': ['linux_dbg_32_trigger']},
     {'name': 'Linux Tests (dbg)(1)(32)'},
     {'name': 'Linux Tests (dbg)(2)(32)'},
     {'name': 'Linux Builder (dbg)', 'triggers': ['linux_dbg_trigger']},
     {'name': 'Linux Tests (dbg)(1)'},
     {'name': 'Linux Tests (dbg)(2)'},
     {'name': 'Linux Clang (dbg)'},
+    {'name': 'Linux GN (dbg)', 'recipe': 'chromium_gn'},
   ]
 
   c['builders'].extend([
       {
         'name': spec['name'],
         'factory': m_annotator.BaseFactory(
-            'chromium',
+            spec.get('recipe', 'chromium'),
             factory_properties=spec.get('factory_properties'),
             triggers=spec.get('triggers')),
         'notify_on_missing': True,
         'category': '4linux',
       } for spec in specs
   ])