Enable ninja_confirm_noop by default

scripts/slave/recipes/dart/dartium_android_builder.expected/dartium_builder_git.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]"
     ],
     "cwd": "[SLAVE_BUILD]",
     "name": "cleanup index.lock",
@@ skipping 161 matching lines @@
       "--target",
       "Release",
       "--src-dir",
       "[SLAVE_BUILD]/src",
       "--build-tool",
       "ninja",
       "--compiler",
       "goma",
       "--goma-dir",
       "[BUILD]/goma",
+      "--ninja-ensure-up-to-date",
       "--",
       "content_shell_apk"
     ],
     "cwd": "[SLAVE_BUILD]",
     "env": {
       "PATH": "[SLAVE_BUILD]/src/third_party/android_tools/sdk/platform-tools:[SLAVE_BUILD]/src/build/android:%(PATH)s"
     },
     "name": "compile"
   },
   {
     "cmd": [
       "python",
       "-u",
       "[SLAVE_BUILD]/src/dart/tools/bots/dartium_android.py",
       "--build-products-dir",
       "[SLAVE_BUILD]/src/out/Release"
     ],
     "cwd": "[SLAVE_BUILD]",
     "name": "dartium_test"
   }
 ]