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

scripts/slave/recipes/chromium.expected/full_chromium_win_Win7_Tests__1_.json

 [
   {
     "cmd": [
       "python",
       "-u",
       "[BUILD]\\scripts\\slave\\kill_processes.py"
     ],
     "name": "taskkill"
   },
   {
@@ skipping 102 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\": \"Win7 Tests (1)\", \"buildnumber\": 571, \"slavename\": \"TestSlavename\"}"
+      "{\"buildername\": \"Win7 Tests (1)\", \"buildnumber\": 571, \"mastername\": \"chromium.win\", \"slavename\": \"TestSlavename\", \"target_platform\": \"win\"}"
     ],
     "name": "get compile targets for scripts",
     "~followup_annotations": [
       "@@@STEP_LOG_LINE@json.output@{}@@@",
       "@@@STEP_LOG_END@json.output@@@"
     ]
   },
   {
     "cmd": [
       "python",
@@ skipping 186 matching lines @@
     "cmd": [
       "python",
       "-u",
       "[BUILD]\\scripts\\slave\\process_dumps.py",
       "--target",
       "Release"
     ],
     "name": "process_dumps"
   }
 ]