GN: add sanitize arg

infra/bots/recipes/swarm_perf.expected/Perf-Mac-Clang-MacMini6.2-CPU-AVX-x86_64-Release-GN.json

 [
   {
     "cmd": [
       "python",
       "-u",
       "\nimport shutil\nimport sys\nshutil.copy(sys.argv[1], sys.argv[2])\n",
       "[SLAVE_BUILD]/skia/infra/bots/assets/skp/VERSION",
       "/path/to/tmp/"
     ],
     "name": "Get downloaded SKP VERSION"
@@ skipping 87 matching lines @@
       "@@@STEP_LOG_LINE@python.inline@if not os.path.isdir(path):@@@",
       "@@@STEP_LOG_LINE@python.inline@  if os.path.exists(path):@@@",
       "@@@STEP_LOG_LINE@python.inline@    print \"%s exists but is not a dir\" % path@@@",
       "@@@STEP_LOG_LINE@python.inline@    sys.exit(1)@@@",
       "@@@STEP_LOG_LINE@python.inline@  os.makedirs(path, mode)@@@",
       "@@@STEP_LOG_END@python.inline@@@"
     ]
   },
   {
     "cmd": [
-      "catchsegv",
       "[SLAVE_BUILD]/out/Release/nanobench",
       "--undefok",
       "-i",
       "[SLAVE_BUILD]/skia/resources",
       "--skps",
       "[SLAVE_BUILD]/skp",
       "--images",
       "[SLAVE_BUILD]/skimage/nanobench",
       "--nogpu",
       "--pre_log",
@@ skipping 53 matching lines @@
       "CPU",
       "cpu_or_gpu_value",
       "AVX",
       "extra_config",
       "GN",
       "model",
       "MacMini6.2",
       "os",
       "Mac"
     ],
-    "env": {
-      "BUILDTYPE": "Release",
-      "CHROME_HEADLESS": "1",
-      "SKIA_OUT": "[SLAVE_BUILD]/out"
-    },
+    "cwd": "[SLAVE_BUILD]/skia",
     "name": "nanobench"
   },
   {
     "cmd": [
       "python",
       "-u",
       "\nimport sys, os\npath = sys.argv[1]\nmode = int(sys.argv[2])\nif not os.path.isdir(path):\n  if os.path.exists(path):\n    print \"%s exists but is not a dir\" % path\n    sys.exit(1)\n  os.makedirs(path, mode)\n",
       "[CUSTOM_[SWARM_OUT_DIR]]/perfdata/Perf-Mac-Clang-MacMini6.2-CPU-AVX-x86_64-Release-GN/data",
       "511"
     ],
@@ skipping 10 matching lines @@
       "@@@STEP_LOG_LINE@python.inline@  os.makedirs(path, mode)@@@",
       "@@@STEP_LOG_END@python.inline@@@"
     ]
   },
   {
     "name": "$result",
     "recipe_result": null,
     "status_code": 0
   }
 ]