Remove all mac 10.5 bots from the main waterfall. Create placeholders for 10.7 bots.

masters/master.chromium.mac/slaves.cfg

Index: masters/master.chromium.mac/slaves.cfg
===================================================================
--- masters/master.chromium.mac/slaves.cfg	(revision 143624)
+++ masters/master.chromium.mac/slaves.cfg	(working copy)
@@ -20,32 +20,32 @@
 #     'version': '10.6',
 #     'bits': '64',
 #   },
+##   {
+##     'master': 'Chromium',
+##     'hostname': 'vm612-m1',
+##     'builder': 'Mac10.7 Tests (1)',
+##     'os': 'mac',
+##     'version': '10.7',
+##     'bits': '64',
+##   },
+##   {
+##     'master': 'Chromium',
+##     'hostname': 'vm613-m1',
+##     'builder': 'Mac10.7 Tests (2)',
+##     'os': 'mac',
+##     'version': '10.7',
+##     'bits': '64',
+##   },
+##   {
+##     'master': 'Chromium',
+##     'hostname': 'vm614-m1',
+##     'builder': 'Mac10.7 Tests (3)',
+##     'os': 'mac',
+##     'version': '10.7',
+##     'bits': '64',
+##   },
 #   {
 #     'master': 'Chromium',
-#     'hostname': 'vm612-m1',
-#     'builder': 'Mac10.5 Tests (1)',
-#     'os': 'mac',
-#     'version': '10.5',
-#     'bits': '64',
-#   },
-#   {
-#     'master': 'Chromium',
-#     'hostname': 'vm613-m1',
-#     'builder': 'Mac10.5 Tests (2)',
-#     'os': 'mac',
-#     'version': '10.5',
-#     'bits': '64',
-#   },
-#   {
-#     'master': 'Chromium',
-#     'hostname': 'vm614-m1',
-#     'builder': 'Mac10.5 Tests (3)',
-#     'os': 'mac',
-#     'version': '10.5',
-#     'bits': '64',
-#   },
-#   {
-#     'master': 'Chromium',
 #     'hostname': 'vm603-m1',
 #     'builder': 'Mac10.6 Tests (1)',
 #     'os': 'mac',
@@ -76,40 +76,40 @@
 #     'version': '10.6',
 #     'bits': '64',
 #   },
+##   {
+##     'master': 'Chromium',
+##     'hostname': 'vm615-m1',
+##     'builder': 'Mac 10.7 Tests (dbg)(1)',
+##     'os': 'mac',
+##     'version': '10.7',
+##     'bits': '64',
+##   },
+##   {
+##     'master': 'Chromium',
+##     'hostname': 'vm616-m1',
+##     'builder': 'Mac 10.7 Tests (dbg)(2)',
+##     'os': 'mac',
+##     'version': '10.7',
+##     'bits': '64',
+##   },
+##   {
+##     'master': 'Chromium',
+##     'hostname': 'vm617-m1',
+##     'builder': 'Mac 10.7 Tests (dbg)(3)',
+##     'os': 'mac',
+##     'version': '10.7',
+##     'bits': '64',
+##   },
+##   {
+##     'master': 'Chromium',
+##     'hostname': 'vm618-m1',
+##     'builder': 'Mac 10.7 Tests (dbg)(4)',
+##     'os': 'mac',
+##     'version': '10.7',
+##     'bits': '64',
+##   },
 #   {
 #     'master': 'Chromium',
-#     'hostname': 'vm615-m1',
-#     'builder': 'Mac 10.5 Tests (dbg)(1)',
-#     'os': 'mac',
-#     'version': '10.5',
-#     'bits': '64',
-#   },
-#   {
-#     'master': 'Chromium',
-#     'hostname': 'vm616-m1',
-#     'builder': 'Mac 10.5 Tests (dbg)(2)',
-#     'os': 'mac',
-#     'version': '10.5',
-#     'bits': '64',
-#   },
-#   {
-#     'master': 'Chromium',
-#     'hostname': 'vm617-m1',
-#     'builder': 'Mac 10.5 Tests (dbg)(3)',
-#     'os': 'mac',
-#     'version': '10.5',
-#     'bits': '64',
-#   },
-#   {
-#     'master': 'Chromium',
-#     'hostname': 'vm618-m1',
-#     'builder': 'Mac 10.5 Tests (dbg)(4)',
-#     'os': 'mac',
-#     'version': '10.5',
-#     'bits': '64',
-#   },
-#   {
-#     'master': 'Chromium',
 #     'hostname': 'vm606-m1',
 #     'builder': 'Mac 10.6 Tests (dbg)(1)',
 #     'os': 'mac',