webrtc: prepare for running under remote_run

scripts/slave/recipes/webrtc/standalone.expected/tryserver_webrtc_android_gn_rel.json

 [
   {
     "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",
+      "[BUILDER_CACHE]/android_gn_rel",
+      "511"
+    ],
+    "name": "makedirs checkout path",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@python.inline@@@@",
+      "@@@STEP_LOG_LINE@python.inline@import sys, os@@@",
+      "@@@STEP_LOG_LINE@python.inline@path = sys.argv[1]@@@",
+      "@@@STEP_LOG_LINE@python.inline@mode = int(sys.argv[2])@@@",
+      "@@@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": [
+      "python",
+      "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--master",
       "tryserver.webrtc",
       "--builder",
       "android_gn_rel",
       "--slave",
       "slavename",
       "--spec",
       "cache_dir = '[GIT_CACHE]'\nsolutions = [{'deps_file': 'DEPS', 'managed': True, 'name': 'src', 'url': 'https://chromium.googlesource.com/external/webrtc'}, {'deps_file': 'DEPS', 'managed': True, 'name': 'webrtc-limited', 'url': 'https://chrome-internal.googlesource.com/chrome/deps/webrtc-limited'}]\ntarget_os = ['android']",
       "--root",
       "src",
       "--revision_mapping_file",
       "{\"src\": \"got_revision\"}",
       "--git-cache-dir",
       "[GIT_CACHE]",
       "--issue",
       "666666",
       "--patchset",
       "1",
       "--rietveld_server",
       "https://fake.rietveld.url",
       "--output_json",
       "/path/to/tmp/json",
       "--revision",
       "src@12345",
       "--output_manifest"
     ],
+    "cwd": "[BUILDER_CACHE]/android_gn_rel",
     "env": {
       "PATH": "%(PATH)s:RECIPE_PACKAGE_REPO[depot_tools]"
     },
     "name": "bot_update",
     "~followup_annotations": [
       "@@@STEP_TEXT@Some step text@@@",
       "@@@STEP_LOG_LINE@json.output@{@@@",
       "@@@STEP_LOG_LINE@json.output@  \"did_run\": true, @@@",
       "@@@STEP_LOG_LINE@json.output@  \"fixed_revisions\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"src\": \"12345\"@@@",
@@ skipping 16 matching lines @@
       "@@@STEP_LOG_END@json.output@@@",
       "@@@SET_BUILD_PROPERTY@got_revision@\"f27fede2220bcd326aee3e86ddfd4ebd0fe58cb9\"@@@",
       "@@@SET_BUILD_PROPERTY@got_revision_cp@\"refs/heads/master@{#170242}\"@@@"
     ]
   },
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_MODULE[build::webrtc]/resources/cleanup_files.py",
-      "[SLAVE_BUILD]/src/out"
+      "[BUILDER_CACHE]/android_gn_rel/src/out"
     ],
     "name": "clean test output files"
   },
   {
     "cmd": [
       "python",
       "-u",
       "\nimport shutil, sys, os\nshutil.rmtree(sys.argv[1], True)\nshutil.rmtree(sys.argv[2], True)\ntry:\n  os.remove(sys.argv[3])\nexcept OSError:\n  pass\nfor base, _dirs, files in os.walk(sys.argv[4]):\n  for f in files:\n    if f.endswith('.pyc'):\n      os.remove(os.path.join(base, f))\n",
-      "[SLAVE_BUILD]/src/out/Release/debug_info_dumps",
-      "[SLAVE_BUILD]/src/out/Release/test_logs",
-      "[SLAVE_BUILD]/src/out/build_product.zip",
-      "[SLAVE_BUILD]/src"
+      "[BUILDER_CACHE]/android_gn_rel/src/out/Release/debug_info_dumps",
+      "[BUILDER_CACHE]/android_gn_rel/src/out/Release/test_logs",
+      "[BUILDER_CACHE]/android_gn_rel/src/out/build_product.zip",
+      "[BUILDER_CACHE]/android_gn_rel/src"
     ],
     "name": "clean local files",
     "~followup_annotations": [
       "@@@STEP_LOG_LINE@python.inline@@@@",
       "@@@STEP_LOG_LINE@python.inline@import shutil, sys, os@@@",
       "@@@STEP_LOG_LINE@python.inline@shutil.rmtree(sys.argv[1], True)@@@",
       "@@@STEP_LOG_LINE@python.inline@shutil.rmtree(sys.argv[2], True)@@@",
       "@@@STEP_LOG_LINE@python.inline@try:@@@",
       "@@@STEP_LOG_LINE@python.inline@  os.remove(sys.argv[3])@@@",
       "@@@STEP_LOG_LINE@python.inline@except OSError:@@@",
@@ skipping 59 matching lines @@
       "@@@STEP_LOG_END@json.output@@@"
     ]
   },
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_PACKAGE_REPO[depot_tools]/gclient.py",
       "runhooks"
     ],
-    "cwd": "[SLAVE_BUILD]/src",
+    "cwd": "[BUILDER_CACHE]/android_gn_rel/src",
     "env": {
       "GOMA_SERVICE_ACCOUNT_JSON_FILE": "/creds/service_accounts/service-account-goma-client.json",
       "GYP_CHROMIUM_NO_ACTION": "1",
       "GYP_CROSSCOMPILE": "1",
       "GYP_DEFINES": "OS=android component=static_library dcheck_always_on=1 fastbuild=1 gomadir='[CACHE]/cipd/goma' target_arch=arm use_goma=1",
-      "PATH": "[SLAVE_BUILD]/src/third_party/android_tools/sdk/platform-tools:[SLAVE_BUILD]/src/build/android:%(PATH)s:RECIPE_PACKAGE_REPO[depot_tools]"
+      "PATH": "[BUILDER_CACHE]/android_gn_rel/src/third_party/android_tools/sdk/platform-tools:[BUILDER_CACHE]/android_gn_rel/src/build/android:%(PATH)s:RECIPE_PACKAGE_REPO[depot_tools]"
     },
     "name": "gclient runhooks"
   },
   {
     "cmd": [
       "python",
       "-u",
-      "[DEPOT_TOOLS]/gn.py",
-      "--root=[SLAVE_BUILD]/src",
+      "RECIPE_PACKAGE_REPO[depot_tools]/gn.py",
+      "--root=[BUILDER_CACHE]/android_gn_rel/src",
       "gen",
       "//out/Release",
       "--args=is_debug=false target_os=\"android\" target_cpu=\"arm\" use_goma=true goma_dir=\"[CACHE]/cipd/goma\""
     ],
     "name": "gn"
   },
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_PACKAGE_REPO[build]/scripts/tools/runit.py",
       "--show-path",
       "python",
       "RECIPE_PACKAGE_REPO[build]/scripts/slave/compile.py",
       "--gsutil-py-path",
       "RECIPE_PACKAGE_REPO[depot_tools]/gsutil.py",
       "--ninja-path",
       "RECIPE_PACKAGE_REPO[depot_tools]/ninja",
       "--target",
       "Release",
       "--src-dir",
-      "[SLAVE_BUILD]/src",
+      "[BUILDER_CACHE]/android_gn_rel/src",
       "--goma-cache-dir",
       "[GOMA_CACHE]",
+      "--goma-deps-cache-dir",
+      "[GOMA_DEPS_CACHE]",
       "--compiler",
       "goma",
       "--goma-jsonstatus",
       "/path/to/tmp/json",
       "--goma-service-account-json-file",
       "/creds/service_accounts/service-account-goma-client.json",
       "--goma-dir",
       "[CACHE]/cipd/goma",
       "--goma-fail-fast",
       "--goma-disable-local-fallback",
       "--",
       "all"
     ],
     "env": {
       "GOMA_SERVICE_ACCOUNT_JSON_FILE": "/creds/service_accounts/service-account-goma-client.json",
-      "PATH": "[SLAVE_BUILD]/src/third_party/android_tools/sdk/platform-tools:[SLAVE_BUILD]/src/build/android:%(PATH)s"
+      "PATH": "[BUILDER_CACHE]/android_gn_rel/src/third_party/android_tools/sdk/platform-tools:[BUILDER_CACHE]/android_gn_rel/src/build/android:%(PATH)s"
     },
     "name": "compile",
     "~followup_annotations": [
       "@@@STEP_LOG_LINE@json.output (invalid)@null@@@",
       "@@@STEP_LOG_END@json.output (invalid)@@@"
     ]
   },
   {
     "name": "$result",
     "recipe_result": null,
     "status_code": 0
   }
 ]