Convert chromium.mac, chromium.fyi iOS bots to run tests on Swarming

scripts/slave/recipes/ios/unified_builder_tester.expected/no_tests.json

 [
   {
     "cmd": [
       "RECIPE_PACKAGE_REPO[build]/scripts/slave/ios/host_info.py",
       "--json-file",
       "/path/to/tmp/json"
     ],
     "name": "host and tools info",
     "~followup_annotations": [
       "@@@STEP_TEXT@<br />OS X 1.2.3, Xcode 6.7.8 (5D342509a)@@@",
@@ skipping 199 matching lines @@
   {
     "cmd": [
       "ninja",
       "-C",
       "[BUILDER_CACHE]/ios/src/out/Release-iphoneos"
     ],
     "cwd": "[BUILDER_CACHE]/ios/src/out/Release-iphoneos",
     "name": "compile"
   },
   {
+    "cmd": [],
+    "name": "bootstrap swarming"
+  },
+  {
+    "cmd": [
+      "python",
+      "-u",
+      "RECIPE_MODULE[depot_tools::git]/resources/git_setup.py",
+      "--path",
+      "[SLAVE_BUILD]/swarming.client",
+      "--url",
+      "https://chromium.googlesource.com/external/swarming.client.git"
+    ],
+    "name": "bootstrap swarming.git setup (swarming_client)",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "retry",
+      "fetch",
+      "origin",
+      "stable"
+    ],
+    "cwd": "[SLAVE_BUILD]/swarming.client",
+    "env": {
+      "PATH": "RECIPE_PACKAGE_REPO[depot_tools]:%(PATH)s"
+    },
+    "name": "bootstrap swarming.git fetch (swarming_client)",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "checkout",
+      "-f",
+      "FETCH_HEAD"
+    ],
+    "cwd": "[SLAVE_BUILD]/swarming.client",
+    "name": "bootstrap swarming.git checkout (swarming_client)",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "rev-parse",
+      "HEAD"
+    ],
+    "cwd": "[SLAVE_BUILD]/swarming.client",
+    "name": "bootstrap swarming.read revision",
+    "stdout": "/path/to/tmp/",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@",
+      "@@@STEP_TEXT@<br/>checked out 'deadbeef'<br/>@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "clean",
+      "-f",
+      "-d",
+      "-x"
+    ],
+    "cwd": "[SLAVE_BUILD]/swarming.client",
+    "name": "bootstrap swarming.git clean (swarming_client)",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "sync"
+    ],
+    "cwd": "[SLAVE_BUILD]/swarming.client",
+    "name": "bootstrap swarming.submodule sync (swarming_client)",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "git",
+      "submodule",
+      "update",
+      "--init",
+      "--recursive"
+    ],
+    "cwd": "[SLAVE_BUILD]/swarming.client",
+    "name": "bootstrap swarming.submodule update (swarming_client)",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python",
+      "-u",
+      "[SLAVE_BUILD]/swarming.client/swarming.py",
+      "--version"
+    ],
+    "name": "bootstrap swarming.swarming.py --version",
+    "stdout": "/path/to/tmp/",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@",
+      "@@@STEP_TEXT@1.2.3@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "isolate"
+  },
+  {
+    "cmd": [
+      "python",
+      "-u",
+      "\nimport shutil\nimport sys\nshutil.copy(sys.argv[1], sys.argv[2])\n",
+      "{\n  \"conditions\": [\n    [\n      \"OS == \\\"ios\\\"\", \n      {\n        \"variables\": {\n          \"command\": [\n            \"src/ios/build/bots/scripts/run.py\", \n            \"--app\", \n            \"<(app_path)\", \n            \"--args-json\", \n            \"{\\\"xctest\\\": <(xctest)}\", \n            \"--out-dir\", \n            \"${ISOLATED_OUTDIR}\", \n            \"--xcode-version\", \n            \"<(xcode_version)\"\n          ], \n          \"files\": [\n            \"<(app_path)/\", \n            \"src/ios/build/bots/scripts/\"\n          ]\n        }\n      }\n    ]\n  ]\n}",
+      "[SLAVE_BUILD]/template.isolate"
+    ],
+    "name": "isolate.generate template.isolate",
+    "~followup_annotations": [
+      "@@@STEP_NEST_LEVEL@1@@@",
+      "@@@STEP_LOG_LINE@template.isolate@{@@@",
+      "@@@STEP_LOG_LINE@template.isolate@  \"conditions\": [@@@",
+      "@@@STEP_LOG_LINE@template.isolate@    [@@@",
+      "@@@STEP_LOG_LINE@template.isolate@      \"OS == \\\"ios\\\"\", @@@",
+      "@@@STEP_LOG_LINE@template.isolate@      {@@@",
+      "@@@STEP_LOG_LINE@template.isolate@        \"variables\": {@@@",
+      "@@@STEP_LOG_LINE@template.isolate@          \"command\": [@@@",
+      "@@@STEP_LOG_LINE@template.isolate@            \"src/ios/build/bots/scripts/run.py\", @@@",
+      "@@@STEP_LOG_LINE@template.isolate@            \"--app\", @@@",
+      "@@@STEP_LOG_LINE@template.isolate@            \"<(app_path)\", @@@",
+      "@@@STEP_LOG_LINE@template.isolate@            \"--args-json\", @@@",
+      "@@@STEP_LOG_LINE@template.isolate@            \"{\\\"xctest\\\": <(xctest)}\", @@@",
+      "@@@STEP_LOG_LINE@template.isolate@            \"--out-dir\", @@@",
+      "@@@STEP_LOG_LINE@template.isolate@            \"${ISOLATED_OUTDIR}\", @@@",
+      "@@@STEP_LOG_LINE@template.isolate@            \"--xcode-version\", @@@",
+      "@@@STEP_LOG_LINE@template.isolate@            \"<(xcode_version)\"@@@",
+      "@@@STEP_LOG_LINE@template.isolate@          ], @@@",
+      "@@@STEP_LOG_LINE@template.isolate@          \"files\": [@@@",
+      "@@@STEP_LOG_LINE@template.isolate@            \"<(app_path)/\", @@@",
+      "@@@STEP_LOG_LINE@template.isolate@            \"src/ios/build/bots/scripts/\"@@@",
+      "@@@STEP_LOG_LINE@template.isolate@          ]@@@",
+      "@@@STEP_LOG_LINE@template.isolate@        }@@@",
+      "@@@STEP_LOG_LINE@template.isolate@      }@@@",
+      "@@@STEP_LOG_LINE@template.isolate@    ]@@@",
+      "@@@STEP_LOG_LINE@template.isolate@  ]@@@",
+      "@@@STEP_LOG_LINE@template.isolate@}@@@",
+      "@@@STEP_LOG_END@template.isolate@@@"
+    ]
+  },
+  {
+    "cmd": [],
+    "name": "trigger"
+  },
+  {
     "name": "$result",
     "recipe_result": null,
     "status_code": 0
   }
 ]