Try again to flip the official mac builders to GN.

tools/mb/mb_config.pyl

Index: tools/mb/mb_config.pyl
diff --git a/tools/mb/mb_config.pyl b/tools/mb/mb_config.pyl
index 0a9eaeffa076b9578245c312085f2e56fb9745da..724049737f9569ae8286d97adc128f97dda2570f 100644
--- a/tools/mb/mb_config.pyl
+++ b/tools/mb/mb_config.pyl
@@ -14,7 +14,7 @@
     'chromium': {
       'Android': 'android_without_codecs_gn_release_bot_minimal_symbols',
       'Linux x64': 'noswarming_gn_release_bot',
-      'Mac': 'noswarming_gyp_release_bot_mac_strip',
+      'Mac': 'noswarming_gn_release_bot_mac_strip',

[Robert Sesek, 2016/07/18 23:18:58]

Did you want to set save_unstripped_output = true in this CL or in a follow-up
for this config?

       'Win': 'noswarming_gyp_release_bot_minimal_symbols_x86',
       'Win x64': 'noswarming_gn_release_bot_minimal_symbols_x64',
     },
@@ -616,7 +616,7 @@
 
     'official.desktop': {
       'blimp-engine': '//build/args/bots/official.desktop/blimp-engine.gn',
-      'mac64': 'gyp_official',
+      'mac64': 'gn_official',
       'precise64': 'gn_official',
 
       # Currently the official bots set mini_installer_official_deps=1
@@ -631,7 +631,7 @@
     'official.desktop.continuous': {
       'mac beta': 'gyp_official',
       'mac stable': 'gyp_official',
-      'mac trunk': 'gyp_official',
+      'mac trunk': 'gn_official',
       'precise64 beta': 'gn_official',
       'precise64 stable': 'gn_official',
       'precise64 trunk': 'gn_official',
@@ -792,7 +792,7 @@
       'ios-simulator-gn': 'ios_gn',
       'mac_chromium_10.10_rel_ng': 'swarming_gpu_tests_gn_release_trybot',
       'mac_chromium_10.10_macviews': 'mac_views_browser_gyp_release_trybot',
-      'mac_chromium_archive_rel_ng': 'noswarming_gyp_release_bot_mac_strip',
+      'mac_chromium_archive_rel_ng': 'noswarming_gn_release_bot_mac_strip',
       'mac_chromium_asan_rel_ng': 'swarming_asan_dcheck_gyp_release_bot',
       'mac_chromium_asan_variable': 'findit',
       'mac_chromium_compile_dbg_ng': 'swarming_gn_debug_trybot',
@@ -1442,8 +1442,8 @@
       'noswarming', 'gn', 'release_bot', 'x64',
     ],
 
-    'noswarming_gyp_release_bot_mac_strip': [
-      'noswarming', 'gyp', 'release_bot', 'mac_strip',
+    'noswarming_gn_release_bot_mac_strip': [
+      'noswarming', 'gn', 'release_bot', 'mac_strip',
     ],
 
     'noswarming_gn_release_trybot_x64': [