Add linux_chromium_headless_dbg trybot builder and slaves

masters/master.tryserver.chromium.linux/slaves.cfg

 # -*- python -*-
 # ex: set syntax=python:
 # Copyright 2014 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.
 
 # See master.experimental/slaves.cfg for documentation.
 
 def linux():
   chromeos_boards = ('x86-generic', 'amd64-generic', 'daisy')
-  cq_slaves = (range(111, 131) + range(162, 399) + range(427, 453) +
-               range(493, 497) + range(506, 540) + range(590, 600) +
-               range(621, 651) + range(779, 799) + range(800, 837) +
-               range(841, 864) + range(878, 897) + range(909, 914) +
-               range(1010, 1029))
+  cq_slaves = (range(111, 131) + range(162, 399) + range(426, 453) +
+               range(493, 498) + range(506, 540) + range(590, 600) +
+               range(621, 651) + [776] + range(779, 799) + range(800, 837) +
+               range(841, 866) + [872] + range(878, 897) + range(909, 914) +
+               range(1010, 1029) + range(1069, 1098))
   cq_builders = [
     'blimp_linux_dbg',
     'cast_shell_linux',
     'chromium_devtools',
     'chromium_presubmit',
     'linux_chromium_archive_rel_ng',
     'linux_chromium_asan_rel_ng',
     'linux_chromium_chromeos_asan_rel_ng',
     'linux_chromium_chromeos_compile_dbg_ng',
     'linux_chromium_chromeos_ozone_rel_ng',
     'linux_chromium_chromeos_rel_ng',
     'linux_chromium_clobber_rel_ng',
     'linux_chromium_compile_dbg_ng',
     'linux_chromium_gn_chromeos_dbg',
     'linux_chromium_gn_chromeos_rel',
+    'linux_chromium_headless_dbg',
     'linux_chromium_rel_ng',
   ]
   cq_builders += [
     'chromeos_%s_chromium_compile_only_ng' % (board,)
     for board in chromeos_boards
   ]
 
   # Slave pools have two competing constraints:
   #  - load: peak number of concurrent builds. Larger pools are safer.
   #  - disk space: too many builders on the same pool will exhaust
@@ skipping 67 matching lines @@
     'linux_chromium_webkit_msan_variable',    # linux_layout_msan
     'linux_chromium_webkit_variable',         # linux_layout
   ]
 
   # Set up normal slaves.
   result = []
   for i, slave in enumerate(cq_slaves):
     result.append({
       'master': 'TryServerChromiumLinux',
       'os': 'linux',
       'version': 'precise',

[perezju, 2016/09/12 14:00:27]

I'm a bit confused about this bit here, the slaves were set in crbug.com/633985
as trusty, but here all seem to be declared as precise?

Would I need to setup a separate loop over the new slaves only, and assign those
the the new headless trybot?

[Dirk Pranke, 2016/09/12 18:45:20]

Yup. What you have here is wrong, because it'll mix precise and trusty VMs into
the same pool.

       'bits': '64',
       'builder': cq_builders,
       'preferred_builder': cq_builders[i % len(cq_builders)],
       'hostname': 'slave%d-c4' % slave,
       'pool': 'linux_cq',
     })
   for slave in optional_slaves1:
     result.append({
       'master': 'TryServerChromiumLinux',
       'os': 'linux',
@@ skipping 56 matching lines @@
       'builder': ['linux_layout_tests_slimming_paint_v2'],
       'hostname': 'slave775-c4',
       'pool': 'linux_layout_tests_slimming_paint_v2',
     }
   ])
 
   return result
 
 
 slaves = linux()