ios: prepare for running under remote_run

scripts/slave/recipes/ios/try.expected/gn.json

Index: scripts/slave/recipes/ios/try.expected/gn.json
diff --git a/scripts/slave/recipes/ios/try.expected/gn.json b/scripts/slave/recipes/ios/try.expected/gn.json
index c85a83ad4753f6aac68b86dcbf196e2216d2a221..692dd99f33a0d010858e779fc9b89d3cf61afc6c 100644
--- a/scripts/slave/recipes/ios/try.expected/gn.json
+++ b/scripts/slave/recipes/ios/try.expected/gn.json
@@ -25,6 +25,28 @@
     "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]/ios_simulator_gn",
+      "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.fake",
@@ -51,6 +73,7 @@
       "--force",
       "--output_manifest"
     ],
+    "cwd": "[BUILDER_CACHE]/ios_simulator_gn",
     "env": {
       "PATH": "%(PATH)s:RECIPE_PACKAGE_REPO[depot_tools]"
     },
@@ -135,7 +158,7 @@
       "python",
       "-u",
       "\nimport shutil\nimport sys\nshutil.copy(sys.argv[1], sys.argv[2])\n",
-      "[SLAVE_BUILD]/src/ios/build/bots/chromium.mac/ios-simulator-gn.json",
+      "[BUILDER_CACHE]/ios_simulator_gn/src/ios/build/bots/chromium.mac/ios-simulator-gn.json",
       "/path/to/tmp/json"
     ],
     "name": "read build config",
@@ -247,7 +270,7 @@
       "RECIPE_PACKAGE_REPO[depot_tools]/gclient.py",
       "runhooks"
     ],
-    "cwd": "[SLAVE_BUILD]/src",
+    "cwd": "[BUILDER_CACHE]/ios_simulator_gn/src",
     "env": {
       "GYP_CHROMIUM_NO_ACTION": "1",
       "GYP_CROSSCOMPILE": "1",
@@ -265,19 +288,19 @@
     "cmd": [
       "python",
       "-u",
-      "[SLAVE_BUILD]/src/tools/mb/mb.py",
+      "[BUILDER_CACHE]/ios_simulator_gn/src/tools/mb/mb.py",
       "gen",
       "-m",
       "chromium.mac",
       "-b",
       "ios-simulator-gn",
       "--config-file",
-      "[SLAVE_BUILD]/src/tools/mb/mb_config.pyl",
+      "[BUILDER_CACHE]/ios_simulator_gn/src/tools/mb/mb_config.pyl",
       "--goma-dir",
       "[CACHE]/cipd/goma",
       "//out/Debug-iphonesimulator"
     ],
-    "cwd": "[SLAVE_BUILD]/src",
+    "cwd": "[BUILDER_CACHE]/ios_simulator_gn/src",
     "env": {
       "GOMA_SERVICE_ACCOUNT_JSON_FILE": "/creds/service_accounts/service-account-goma-client.json"
     },
@@ -303,7 +326,7 @@
       "python",
       "-u",
       "\nimport shutil\nimport sys\nshutil.copy(sys.argv[1], sys.argv[2])\n",
-      "[SLAVE_BUILD]/src/testing/buildbot/trybot_analyze_config.json",
+      "[BUILDER_CACHE]/ios_simulator_gn/src/testing/buildbot/trybot_analyze_config.json",
       "/path/to/tmp/json"
     ],
     "name": "read filter exclusion spec",
@@ -327,7 +350,7 @@
     "cmd": [
       "python",
       "-u",
-      "[SLAVE_BUILD]/src/tools/mb/mb.py",
+      "[BUILDER_CACHE]/ios_simulator_gn/src/tools/mb/mb.py",
       "analyze",
       "-m",
       "chromium.mac",