Add counting the number of CPU's in goma module

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 be4f2a4e86f5c842d520cd430798e3933bcde2ef..0da7341b9749d9ea0e9654d3ec63156392ffe046 100644
--- a/scripts/slave/recipes/ios/try.expected/gn.json
+++ b/scripts/slave/recipes/ios/try.expected/gn.json
@@ -254,6 +254,28 @@
   },
   {
     "cmd": [
+      "python",
+      "-u",
+      "\nimport multiprocessing\n\ntry:\n  jobs = min(200, multiprocessing.cpu_count() * 10)\nexcept NotImplementedError:\n  jobs = 50\n\nprint jobs\n"
+    ],
+    "name": "ensure_goma.get the number of cpus",
+    "stdout": "/path/to/tmp/",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@",
+      "@@@STEP_LOG_LINE@python.inline@@@@",
+      "@@@STEP_LOG_LINE@python.inline@import multiprocessing@@@",
+      "@@@STEP_LOG_LINE@python.inline@@@@",
+      "@@@STEP_LOG_LINE@python.inline@try:@@@",
+      "@@@STEP_LOG_LINE@python.inline@  jobs = min(200, multiprocessing.cpu_count() * 10)@@@",
+      "@@@STEP_LOG_LINE@python.inline@except NotImplementedError:@@@",
+      "@@@STEP_LOG_LINE@python.inline@  jobs = 50@@@",
+      "@@@STEP_LOG_LINE@python.inline@@@@",
+      "@@@STEP_LOG_LINE@python.inline@print jobs@@@",
+      "@@@STEP_LOG_END@python.inline@@@"
+    ]
+  },
+  {
+    "cmd": [
       "RECIPE_PACKAGE_REPO[build]/scripts/slave/ios/find_xcode.py",
       "--json-file",
       "/path/to/tmp/json",