Adding variable builders for all builders under master "chromium.chrome"

masters/master.tryserver.chromium.mac/master.cfg

Index: masters/master.tryserver.chromium.mac/master.cfg
diff --git a/masters/master.tryserver.chromium.mac/master.cfg b/masters/master.tryserver.chromium.mac/master.cfg
index c3ff91b9d7588da73569db0cfb90b92a72decf4d..3287c7f17c75699eeed6e789d8644a1e5fe32bd5 100644
--- a/masters/master.tryserver.chromium.mac/master.cfg
+++ b/masters/master.tryserver.chromium.mac/master.cfg
@@ -191,15 +191,20 @@ variable_builders = [
     'slavebuilddir': 'mac'
   },
   {
-    'name': 'mac_chromium_variable_gn',
+    'name': 'mac_chromium_variable_archive',
     'factory': m_annotator.BaseFactory('findit/chromium/compile'),
-    'slavebuilddir': 'mac_gn'
+    'slavebuilddir': 'mac_archive'
   },
   {
-    'name': 'mac_chromium_variable_archive',
+    'name': 'mac_chromium_variable_chrome',
     'factory': m_annotator.BaseFactory('findit/chromium/compile'),
-    'slavebuilddir': 'mac_archive'
-  }
+    'slavebuilddir': 'mac_chrome'
+  },
+  {
+    'name': 'mac_chromium_variable_gn',
+    'factory': m_annotator.BaseFactory('findit/chromium/compile'),
+    'slavebuilddir': 'mac_gn'
+  },
 ]
 
 c['builders'] = [