Update chromium_mac recipe for re-imaged testers.

scripts/slave/recipe_modules/chromium/chromium_mac.py

Index: scripts/slave/recipe_modules/chromium/chromium_mac.py
diff --git a/scripts/slave/recipe_modules/chromium/chromium_mac.py b/scripts/slave/recipe_modules/chromium/chromium_mac.py
index 8a4b8813e58570dd036d1dd43250f032ac955ae2..e28e53e79d92d29ddf9be67723fc387b7c65785b 100644
--- a/scripts/slave/recipe_modules/chromium/chromium_mac.py
+++ b/scripts/slave/recipe_modules/chromium/chromium_mac.py
@@ -25,7 +25,7 @@ SPEC = {
       'enable_swarming': True,
       'use_isolate': True,
     },
-    'Mac10.6 Tests (1)': {
+    'Mac10.6 Tests': {
       'recipe_config': 'chromium',
       'chromium_config_kwargs': {
         'BUILD_CONFIG': 'Release',
@@ -49,7 +49,7 @@ SPEC = {
         'os': 'Mac-10.6',
       },
     },
-    'Mac10.7 Tests (1)': {
+    'Mac10.8 Tests': {
       'recipe_config': 'chromium',
       'chromium_config_kwargs': {
         'BUILD_CONFIG': 'Release',
@@ -70,47 +70,47 @@ SPEC = {
       },
       'enable_swarming': True,
     },
-    'Mac Builder (dbg)': {
+    'Mac10.9 Tests': {
       'recipe_config': 'chromium',
       'chromium_config_kwargs': {
-        'BUILD_CONFIG': 'Debug',
+        'BUILD_CONFIG': 'Release',
         'TARGET_BITS': 32,
       },
-      'bot_type': 'builder',
-      'compile_targets': [
-        'chromium_builder_tests',
+      'test_generators': [
+        steps.generate_gtest,
+      ],
+      'tests': [
+        steps.NaclIntegrationTest(),
+        steps.TelemetryUnitTests(),
+        steps.TelemetryPerfUnitTests(),
       ],
+      'bot_type': 'tester',
+      'parent_buildername': 'Mac Builder',
       'testing': {
         'platform': 'mac',
       },
       'enable_swarming': True,
-      'use_isolate': True,
+      'swarming_dimensions': {
+        'os': 'Mac-10.9',
+      },
     },
-    'Mac 10.6 Tests (dbg)(1)': {
+    'Mac Builder (dbg)': {
       'recipe_config': 'chromium',
       'chromium_config_kwargs': {
         'BUILD_CONFIG': 'Debug',
         'TARGET_BITS': 32,
       },
-      'test_generators': [
-        steps.generate_gtest,
-      ],
-      'tests': [
-        steps.NaclIntegrationTest(),
-        steps.TelemetryUnitTests(),
-        steps.TelemetryPerfUnitTests(),
+      'bot_type': 'builder',
+      'compile_targets': [
+        'chromium_builder_tests',
       ],
-      'bot_type': 'tester',
-      'parent_buildername': 'Mac Builder (dbg)',
       'testing': {
         'platform': 'mac',
       },
       'enable_swarming': True,
-      'swarming_dimensions': {
-        'os': 'Mac-10.6',
-      },
+      'use_isolate': True,
     },
-    'Mac 10.7 Tests (dbg)(1)': {
+    'Mac10.9 Tests (dbg)': {
       'recipe_config': 'chromium',
       'chromium_config_kwargs': {
         'BUILD_CONFIG': 'Debug',