Flip the /p/chromium Mac builder (and trybot) back to GYP.

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 ecf9e0bfcd01785517eb4012676fca41a917f967..01a8ab8384f04a6b49a209c1b3afbc9b62a9cec9 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_gn_release_bot_mac_strip',
+      'Mac': 'noswarming_gyp_release_bot_mac_strip',
       'Win': 'noswarming_gn_release_bot_minimal_symbols_x86',
       'Win x64': 'noswarming_gn_release_bot_minimal_symbols_x64',
     },
@@ -787,7 +787,7 @@
       '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_gn_release_bot_mac_strip',
+      'mac_chromium_archive_rel_ng': 'noswarming_gyp_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',
@@ -1427,8 +1427,8 @@
       'noswarming', 'gn', 'release_bot', 'x64',
     ],
 
-    'noswarming_gn_release_bot_mac_strip': [
-      'noswarming', 'gn', 'release_bot', 'mac_strip',
+    'noswarming_gyp_release_bot_mac_strip': [
+      'noswarming', 'gyp', 'release_bot', 'mac_strip',
     ],
 
     'noswarming_gn_release_trybot_x64': [