Replace 10.7 testers with 10.9 in master.chromium.mac

masters/master.chromium.mac/master_mac_cfg.py

Index: masters/master.chromium.mac/master_mac_cfg.py
diff --git a/masters/master.chromium.mac/master_mac_cfg.py b/masters/master.chromium.mac/master_mac_cfg.py
index f7ce9ad381167711506f551908109a91c8932714..a285a9c6755e6c3dc592f67bf4825df051a9df2a 100644
--- a/masters/master.chromium.mac/master_mac_cfg.py
+++ b/masters/master.chromium.mac/master_mac_cfg.py
@@ -19,12 +19,12 @@ def Update(config, active_master, c):
           'Mac Builder (dbg)',
       ]),
       Triggerable(name='mac_rel_trigger', builderNames=[
-          'Mac10.6 Tests (1)',
-          'Mac10.7 Tests (1)',
+          'Mac10.6 Tests',
+          'Mac10.8 Tests',
+          'Mac10.9 Tests',
       ]),
       Triggerable(name='mac_dbg_trigger', builderNames=[
-          'Mac 10.6 Tests (dbg)(1)',
-          'Mac 10.7 Tests (dbg)(1)',
+          'Mac10.9 Tests (dbg)',
       ]),
   ])
   specs = [
@@ -32,14 +32,14 @@ def Update(config, active_master, c):
       'name': 'Mac Builder',
       'triggers': ['mac_rel_trigger'],
     },
-    {'name': 'Mac10.6 Tests (1)'},
-    {'name': 'Mac10.7 Tests (1)'},
+    {'name': 'Mac10.6 Tests'},
+    {'name': 'Mac10.8 Tests'},
+    {'name': 'Mac10.9 Tests'},
     {
       'name': 'Mac Builder (dbg)',
       'triggers': ['mac_dbg_trigger'],
     },
-    {'name': 'Mac 10.6 Tests (dbg)(1)'},
-    {'name': 'Mac 10.7 Tests (dbg)(1)'},
+    {'name': 'Mac10.9 Tests (dbg)'},
   ]
 
   c['builders'].extend([