Add support for goma-clang to make builds, switch macmake fyi bot over.

build/masters/master.chromium.fyi/master.cfg

 # Copyright (c) 2011 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 import locks
 from buildbot.changes import svnpoller
 from buildbot.scheduler import Dependent
 from buildbot.scheduler import Nightly
 from buildbot.scheduler import Periodic
 from buildbot.scheduler import Scheduler
@@ skipping 660 matching lines @@
         '--', '-project', '../build/all.xcodeproj'],
     factory_properties={
       'gclient_env': {
         'GYP_DEFINES':'clang=1 clang_use_chrome_plugins=1 fastbuild=1',
       },
     },
     tests=[])
 
 f_chromium_mac_make = mac().ChromiumFactory(
     target='Debug',
-    options=['--build-tool=make'],
+    options=['--build-tool=make', '--compiler=goma-clang'],
     factory_properties={
         'gclient_env': { 'GYP_GENERATORS':'make',}
     },
     tests=['base', 'gfx', 'unit', 'crypto'])
 
 f_chromium_mac_skia = mac().ChromiumFactory(
     target='Debug',
     factory_properties={
         'gclient_env': { 'GYP_DEFINES':'use_skia=1'},
     },
@@ skipping 404 matching lines @@
               '%(builder)s, revision %(revision)s',
       extraRecipients=['jochen@chromium.org'],
       lookup=master_utils.FilterDomain(),
       forgiving_steps=forgiving_steps,
       use_getname=True))
 
 ####### PROJECT IDENTITY
 
 # Buildbot master url:
 c['buildbotURL'] = 'http://build.chromium.org/p/chromium.fyi/'