Re-enable DepsCache using GOMA_DEPS_CACHE_FILE

scripts/slave/recipe_modules/cronet/example.expected/local_test.json

 [
   {
     "cmd": [
       "python",
       "-u",
       "\nimport os, sys\n\nbuild_path = sys.argv[1]\nif os.path.exists(build_path):\n  for (path, dir, files) in os.walk(build_path):\n    for cur_file in files:\n      if cur_file.endswith('index.lock'):\n        path_to_file = os.path.join(path, cur_file)\n        print 'deleting %s' % path_to_file\n        os.remove(path_to_file)\n",
       "[SLAVE_BUILD]"
     ],
     "name": "cleanup index.lock",
     "~followup_annotations": [
@@ skipping 188 matching lines @@
       "--src-dir",
       "[SLAVE_BUILD]/src",
       "--goma-cache-dir",
       "[GOMA_CACHE]",
       "--buildbot-buildername",
       "local_test",
       "--buildbot-mastername",
       "chromium.testing.master",
       "--buildbot-slavename",
       "TestSlavename",
+      "--goma-deps-cache-file",
+      "local_test.gomadeps",
       "--",
       "cronet_package",
       "cronet_perf_test_apk",
       "cronet_sample_test_apk",
       "cronet_test_instrumentation_apk",
       "cronet_unittests",
       "cronet_unittests_apk",
       "net_unittests",
       "net_unittests_apk"
     ],
@@ skipping 428 matching lines @@
       "@@@STEP_LOG_LINE@python.inline@  os.remove(report)@@@",
       "@@@STEP_LOG_END@python.inline@@@"
     ]
   },
   {
     "name": "$result",
     "recipe_result": null,
     "status_code": 0
   }
 ]