Update chromium_mac recipe for re-imaged testers.

scripts/slave/recipes/chromium.expected/full_chromium_mac_Mac10_8_Tests.json

 [
   {
     "cmd": [
       "python",
       "-u",
       "[BUILD]/scripts/slave/bot_update.py",
       "--master",
       "chromium.mac",
       "--builder",
-      "Mac10.7 Tests (1)",
+      "Mac10.8 Tests",
       "--slave",
       "TestSlavename",
       "--spec",
       "cache_dir = None\nsolutions = [{'custom_vars': {'googlecode_url': 'svn://svn-mirror.golo.chromium.org/%s', 'nacl_trunk': 'svn://svn-mirror.golo.chromium.org/native_client/trunk', 'sourceforge_url': 'svn://svn-mirror.golo.chromium.org/%(repo)s', 'webkit_trunk': 'svn://svn-mirror.golo.chromium.org/blink/trunk'}, 'deps_file': 'DEPS', 'managed': True, 'name': 'src', 'url': 'svn://svn-mirror.golo.chromium.org/chrome/trunk/src'}]",
       "--revision_mapping_file",
       "{\"src\": \"got_revision\", \"src/native_client\": \"got_nacl_revision\", \"src/third_party/WebKit\": \"got_webkit_revision\", \"src/third_party/webrtc\": \"got_webrtc_revision\", \"src/tools/swarming_client\": \"got_swarming_client_revision\", \"src/v8\": \"got_v8_revision\"}",
       "--output_json",
       "/path/to/tmp/json",
       "--revision",
       "src@1111111"
@@ skipping 79 matching lines @@
       "python",
       "-u",
       "\nimport shutil\nimport sys\nshutil.copy(sys.argv[1], sys.argv[2])\n",
       "[SLAVE_BUILD]/src/testing/buildbot/chromium.mac.json",
       "/path/to/tmp/json"
     ],
     "name": "read test spec",
     "~followup_annotations": [
       "@@@STEP_TEXT@path: [SLAVE_BUILD]/src/testing/buildbot/chromium.mac.json@@@",
       "@@@STEP_LOG_LINE@json.output@{@@@",
-      "@@@STEP_LOG_LINE@json.output@  \"Mac10.7 Tests (1)\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@  \"Mac10.8 Tests\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"gtest_tests\": [@@@",
       "@@@STEP_LOG_LINE@json.output@      {@@@",
       "@@@STEP_LOG_LINE@json.output@        \"swarming\": {@@@",
       "@@@STEP_LOG_LINE@json.output@          \"can_use_on_swarming_builders\": true@@@",
       "@@@STEP_LOG_LINE@json.output@        }, @@@",
       "@@@STEP_LOG_LINE@json.output@        \"test\": \"browser_tests\"@@@",
       "@@@STEP_LOG_LINE@json.output@      }@@@",
       "@@@STEP_LOG_LINE@json.output@    ]@@@",
       "@@@STEP_LOG_LINE@json.output@  }@@@",
       "@@@STEP_LOG_LINE@json.output@}@@@",
       "@@@STEP_LOG_END@json.output@@@"
     ]
   },
   {
     "cmd": [
       "python",
       "-u",
       "[SLAVE_BUILD]/src/testing/scripts/get_compile_targets.py",
       "--output",
       "/path/to/tmp/json",
       "--",
       "--build-config-fs",
       "Release",
       "--paths",
       "{\"build\": \"[BUILD]\"}",
       "--properties",
-      "{\"buildername\": \"Mac10.7 Tests (1)\", \"buildnumber\": 571, \"slavename\": \"TestSlavename\"}"
+      "{\"buildername\": \"Mac10.8 Tests\", \"buildnumber\": 571, \"slavename\": \"TestSlavename\"}"
     ],
     "name": "get compile targets for scripts",
     "~followup_annotations": [
       "@@@STEP_LOG_LINE@json.output@{}@@@",
       "@@@STEP_LOG_END@json.output@@@"
     ]
   },
   {
     "cmd": [
       "python",
@@ skipping 23 matching lines @@
   {
     "cmd": [
       "python",
       "-u",
       "[BUILD]/scripts/slave/extract_build.py",
       "--target",
       "Release",
       "--build-archive-url",
       "gs://test-domain/test-archive.zip",
       "--factory-properties",
-      "{\"blamelist\": [\"cool_dev1337@chromium.org\", \"hax@chromium.org\"], \"buildername\": \"Mac10.7 Tests (1)\", \"buildnumber\": 571, \"mastername\": \"chromium.mac\", \"parent_build_archive_url\": \"gs://test-domain/test-archive.zip\", \"parent_buildername\": \"Mac Builder\", \"parent_got_revision\": \"1111111\", \"recipe\": \"chromium\", \"slavename\": \"TestSlavename\", \"swarm_hashes\": {\"browser_tests\": \"ffffffffffffffffffffffffffffffffffffffff\"}, \"workdir\": \"/path/to/workdir/TestSlavename\"}",
+      "{\"blamelist\": [\"cool_dev1337@chromium.org\", \"hax@chromium.org\"], \"buildername\": \"Mac10.8 Tests\", \"buildnumber\": 571, \"mastername\": \"chromium.mac\", \"parent_build_archive_url\": \"gs://test-domain/test-archive.zip\", \"parent_buildername\": \"Mac Builder\", \"parent_got_revision\": \"1111111\", \"recipe\": \"chromium\", \"slavename\": \"TestSlavename\", \"swarm_hashes\": {\"browser_tests\": \"ffffffffffffffffffffffffffffffffffffffff\"}, \"workdir\": \"/path/to/workdir/TestSlavename\"}",
       "--build-properties",
-      "{\"blamelist\": [\"cool_dev1337@chromium.org\", \"hax@chromium.org\"], \"buildername\": \"Mac10.7 Tests (1)\", \"buildnumber\": 571, \"mastername\": \"chromium.mac\", \"parent_build_archive_url\": \"gs://test-domain/test-archive.zip\", \"parent_buildername\": \"Mac Builder\", \"parent_got_revision\": \"1111111\", \"recipe\": \"chromium\", \"slavename\": \"TestSlavename\", \"swarm_hashes\": {\"browser_tests\": \"ffffffffffffffffffffffffffffffffffffffff\"}, \"workdir\": \"/path/to/workdir/TestSlavename\"}"
+      "{\"blamelist\": [\"cool_dev1337@chromium.org\", \"hax@chromium.org\"], \"buildername\": \"Mac10.8 Tests\", \"buildnumber\": 571, \"mastername\": \"chromium.mac\", \"parent_build_archive_url\": \"gs://test-domain/test-archive.zip\", \"parent_buildername\": \"Mac Builder\", \"parent_got_revision\": \"1111111\", \"recipe\": \"chromium\", \"slavename\": \"TestSlavename\", \"swarm_hashes\": {\"browser_tests\": \"ffffffffffffffffffffffffffffffffffffffff\"}, \"workdir\": \"/path/to/workdir/TestSlavename\"}"
     ],
     "name": "extract build"
   },
   {
     "cmd": [
       "python",
       "-u",
       "[SLAVE_BUILD]/src/tools/swarming_client/swarming.py",
       "trigger",
       "--swarming",
       "https://chromium-swarm.appspot.com",
       "--isolate-server",
       "https://isolateserver.appspot.com",
       "--priority",
       "25",
       "--shards",
       "1",
       "--task-name",
-      "browser_tests/Mac-10.8/ffffffffff/Mac10.7 Tests (1)/571",
+      "browser_tests/Mac-10.8/ffffffffff/Mac10.8 Tests/571",
       "--dump-json",
       "/path/to/tmp/json",
       "--expiration",
       "3600",
       "--io-timeout",
       "1200",
       "--hard-timeout",
       "3600",
       "--dimension",
       "cpu",
       "x86-64",
       "--dimension",
       "gpu",
       "none",
       "--dimension",
       "os",
       "Mac-10.8",
       "--dimension",
       "pool",
       "Chrome",
       "--tag",
-      "buildername:Mac10.7 Tests (1)",
+      "buildername:Mac10.8 Tests",
       "--tag",
       "buildnumber:571",
       "--tag",
       "data:ffffffffffffffffffffffffffffffffffffffff",
       "--tag",
       "master:chromium.mac",
       "--tag",
       "name:browser_tests",
       "--tag",
       "os:Mac-10.8",
       "--tag",
       "project:chromium",
       "--tag",
       "purpose:CI",
       "--tag",
       "purpose:post-commit",
       "--idempotent",
       "ffffffffffffffffffffffffffffffffffffffff",
       "--",
       "--test-launcher-summary-output=${ISOLATED_OUTDIR}/output.json"
     ],
     "name": "[trigger] browser_tests",
     "~followup_annotations": [
       "@@@STEP_LOG_LINE@json.output@{@@@",
-      "@@@STEP_LOG_LINE@json.output@  \"base_task_name\": \"browser_tests/Mac-10.8/ffffffffff/Mac10.7 Tests (1)/571\", @@@",
+      "@@@STEP_LOG_LINE@json.output@  \"base_task_name\": \"browser_tests/Mac-10.8/ffffffffff/Mac10.8 Tests/571\", @@@",
       "@@@STEP_LOG_LINE@json.output@  \"tasks\": {@@@",
-      "@@@STEP_LOG_LINE@json.output@    \"browser_tests/Mac-10.8/ffffffffff/Mac10.7 Tests (1)/571\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@    \"browser_tests/Mac-10.8/ffffffffff/Mac10.8 Tests/571\": {@@@",
       "@@@STEP_LOG_LINE@json.output@      \"shard_index\": 0, @@@",
       "@@@STEP_LOG_LINE@json.output@      \"task_id\": \"10000\", @@@",
       "@@@STEP_LOG_LINE@json.output@      \"view_url\": \"https://chromium-swarm.appspot.com/user/task/10000\"@@@",
       "@@@STEP_LOG_LINE@json.output@    }@@@",
       "@@@STEP_LOG_LINE@json.output@  }@@@",
       "@@@STEP_LOG_LINE@json.output@}@@@",
       "@@@STEP_LOG_END@json.output@@@",
       "@@@STEP_LINK@shard #0@https://chromium-swarm.appspot.com/user/task/10000@@@"
     ]
   },
@@ skipping 10 matching lines @@
       "--merged-test-output",
       "/path/to/tmp/json",
       "--",
       "collect",
       "--swarming",
       "https://chromium-swarm.appspot.com",
       "--decorate",
       "--print-status-updates",
       "--shards",
       "1",
-      "browser_tests/Mac-10.8/ffffffffff/Mac10.7 Tests (1)/571"
+      "browser_tests/Mac-10.8/ffffffffff/Mac10.8 Tests/571"
     ],
     "name": "browser_tests"
   }
 ]