Add support for cc_perftests and other non-telemetry gtest based tests.

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

 [
   {
     "cmd": [
       "python",
       "-u",
       "[BUILD]/scripts/slave/bot_update.py",
       "--master",
       "chromium.webkit",
       "--builder",
       "Linux ChromiumOS Full",
@@ skipping 84 matching lines @@
       "-u",
       "[SLAVE_BUILD]/src/testing/scripts/get_compile_targets.py",
       "--output",
       "/path/to/tmp/json",
       "--",
       "--build-config-fs",
       "Release",
       "--paths",
       "{\"build\": \"[BUILD]\", \"checkout\": \"[SLAVE_BUILD]/src\"}",
       "--properties",
-      "{\"buildername\": \"Linux ChromiumOS Full\", \"buildnumber\": 571, \"slavename\": \"TestSlavename\"}"
+      "{\"buildername\": \"Linux ChromiumOS Full\", \"buildnumber\": 571, \"mastername\": \"chromium.webkit\", \"slavename\": \"TestSlavename\", \"target_platform\": \"linux\"}"
     ],
     "name": "get compile targets for scripts",
     "~followup_annotations": [
       "@@@STEP_LOG_LINE@json.output@{}@@@",
       "@@@STEP_LOG_END@json.output@@@"
     ]
   },
   {
     "cmd": [
       "python",
@@ skipping 62 matching lines @@
       "--target",
       "Release",
       "--factory-properties",
       "{\"gclient_env\": {\"GYP_DEFINES\": \"chromeos=1 component=static_library ffmpeg_branding=ChromeOS gomadir='[BUILD]/goma' proprietary_codecs=1 target_arch=x64 use_goma=1\"}, \"gs_acl\": \"public-read\", \"gs_bucket\": \"gs://chromium-browser-snapshots\"}",
       "--build-properties",
       "{\"got_nacl_revision\": \"d998e125e8253980d76e269b7982aeeefc1b9b50\", \"got_nacl_revision_cp\": \"refs/heads/master@{#274981}\", \"got_revision\": \"f27fede2220bcd326aee3e86ddfd4ebd0fe58cb9\", \"got_revision_cp\": \"refs/heads/master@{#170242}\", \"got_swarming_client_revision\": \"a0ee5d99f1d4b38ddaa4c759c837980b63b99566\", \"got_swarming_client_revision_cp\": \"refs/heads/master@{#276089}\", \"got_v8_revision\": \"801ada225ddc271c132c3a35f03975671d43e399\", \"got_v8_revision_cp\": \"refs/heads/master@{#43426}\", \"got_webkit_revision\": \"5e2293dffc3cd07d37fbedea3b500f0eb650614d\", \"got_webkit_revision_cp\": \"refs/heads/master@{#124383}\", \"got_webrtc_revision\": \"0f90628433546e61d9268596da93418c623137f4\", \"got_webrtc_revision_cp\": \"refs/heads/master@{#120644}\"}"
     ],
     "name": "archive build"
   }
 ]