Add swarming support for MB (and the GN bots) in the chromium recipes.

scripts/slave/recipes/chromium.expected/full_chromium_win_Win8_Aura.json

 [
   {
     "cmd": [
       "python",
       "-u",
       "[BUILD]\\scripts\\slave\\kill_processes.py"
     ],
     "cwd": "[SLAVE_BUILD]",
     "name": "taskkill"
   },
@@ skipping 56 matching lines @@
       "@@@SET_BUILD_PROPERTY@got_v8_revision_cp@\"refs/heads/master@{#43426}\"@@@",
       "@@@SET_BUILD_PROPERTY@got_swarming_client_revision_cp@\"refs/heads/master@{#276089}\"@@@",
       "@@@SET_BUILD_PROPERTY@got_webrtc_revision_cp@\"refs/heads/master@{#120644}\"@@@",
       "@@@SET_BUILD_PROPERTY@got_revision_cp@\"refs/heads/master@{#170242}\"@@@"
     ]
   },
   {
     "cmd": [
       "python",
       "-u",
+      "[SLAVE_BUILD]\\src\\tools\\swarming_client\\swarming.py",
+      "--version"
+    ],
+    "cwd": "[SLAVE_BUILD]",
+    "name": "swarming.py --version",
+    "stdout": "/path/to/tmp/",
+    "~followup_annotations": [
+      "@@@STEP_TEXT@0.4.10@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python",
+      "-u",
       "[DEPOT_TOOLS]\\gclient.py",
       "runhooks"
     ],
     "cwd": "[SLAVE_BUILD]",
     "env": {
       "GYP_CHROMIUM_NO_ACTION": "1"
     },
     "name": "gclient runhooks"
   },
   {
     "cmd": [
-      "python",
-      "-u",
-      "[SLAVE_BUILD]\\src\\tools\\mb\\mb.py",
-      "gen",
-      "-v",
-      "-m",
-      "chromium.win",
-      "-b",
-      "Win8 Aura",
-      "--config-file",
-      "[SLAVE_BUILD]\\src\\tools\\mb\\mb_config.pyl",
-      "--goma-dir",
-      "[BUILD]\\goma",
-      "//out/Debug"
-    ],
-    "cwd": "[SLAVE_BUILD]",
-    "name": "generate_build_files"
-  },
-  {
-    "cmd": [
       "python",
       "-u",
       "\nimport shutil\nimport sys\nshutil.copy(sys.argv[1], sys.argv[2])\n",
       "[SLAVE_BUILD]\\src\\testing\\buildbot\\chromium.win.json",
       "/path/to/tmp/json"
     ],
     "cwd": "[SLAVE_BUILD]",
     "name": "read test spec",
     "~followup_annotations": [
       "@@@STEP_TEXT@path: [SLAVE_BUILD]\\src\\testing\\buildbot\\chromium.win.json@@@",
-      "@@@STEP_LOG_LINE@json.output@{}@@@",
+      "@@@STEP_LOG_LINE@json.output@{@@@",
+      "@@@STEP_LOG_LINE@json.output@  \"Win8 Aura\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@    \"gtest_tests\": [@@@",
+      "@@@STEP_LOG_LINE@json.output@      {@@@",
+      "@@@STEP_LOG_LINE@json.output@        \"swarming\": {@@@",
+      "@@@STEP_LOG_LINE@json.output@          \"can_use_on_swarming_builders\": true@@@",
+      "@@@STEP_LOG_LINE@json.output@        }, @@@",
+      "@@@STEP_LOG_LINE@json.output@        \"test\": \"browser_tests\"@@@",
+      "@@@STEP_LOG_LINE@json.output@      }@@@",
+      "@@@STEP_LOG_LINE@json.output@    ]@@@",
+      "@@@STEP_LOG_LINE@json.output@  }@@@",
+      "@@@STEP_LOG_LINE@json.output@}@@@",
       "@@@STEP_LOG_END@json.output@@@"
     ]
   },
   {
     "cmd": [
       "python",
       "-u",
       "[SLAVE_BUILD]\\src\\testing\\scripts\\get_compile_targets.py",
       "--output",
       "/path/to/tmp/json",
@@ skipping 18 matching lines @@
       "-u",
       "[BUILD]\\scripts\\slave\\cleanup_temp.py"
     ],
     "cwd": "[SLAVE_BUILD]",
     "name": "cleanup_temp"
   },
   {
     "cmd": [
       "python",
       "-u",
+      "[SLAVE_BUILD]\\src\\tools\\mb\\mb.py",
+      "gen",
+      "-v",
+      "-m",
+      "chromium.win",
+      "-b",
+      "Win8 Aura",
+      "--config-file",
+      "[SLAVE_BUILD]\\src\\tools\\mb\\mb_config.pyl",
+      "--goma-dir",
+      "[BUILD]\\goma",
+      "--swarming-targets-file",
+      "browser_tests\n",
+      "//out/Debug"
+    ],
+    "cwd": "[SLAVE_BUILD]",
+    "name": "generate_build_files"
+  },
+  {
+    "cmd": [
+      "python",
+      "-u",
+      "RECIPE_MODULE[isolate]\\resources\\find_isolated_tests.py",
+      "--build-dir",
+      "[SLAVE_BUILD]\\src\\out\\Debug",
+      "--clean-isolated-files"
+    ],
+    "cwd": "[SLAVE_BUILD]",
+    "name": "clean isolated files"
+  },
+  {
+    "cmd": [
+      "python",
+      "-u",
       "[BUILD]\\scripts\\slave\\compile.py",
       "--target",
       "Debug",
       "--src-dir",
       "[SLAVE_BUILD]\\src",
       "--build-tool",
       "ninja",
       "--compiler",
       "goma",
       "--goma-dir",
       "[BUILD]\\goma",
       "--",
-      "All",
-      "chromium_builder_tests"
+      "browser_tests",
+      "browser_tests_run",
+      "crash_service"
     ],
     "cwd": "[SLAVE_BUILD]",
     "name": "compile"
+  },
+  {
+    "cmd": [
+      "python",
+      "-u",
+      "RECIPE_MODULE[isolate]\\resources\\remove_build_metadata.py",
+      "--build-dir",
+      "[SLAVE_BUILD]\\src\\out\\Debug",
+      "--src-dir",
+      "[SLAVE_BUILD]\\src"
+    ],
+    "cwd": "[SLAVE_BUILD]",
+    "name": "remove_build_metadata"
+  },
+  {
+    "cmd": [
+      "python",
+      "-u",
+      "RECIPE_MODULE[isolate]\\resources\\isolate.py",
+      "[SLAVE_BUILD]\\src\\tools\\swarming_client",
+      "batcharchive",
+      "--dump-json",
+      "/path/to/tmp/json",
+      "--isolate-server",
+      "https://isolateserver.appspot.com",
+      "--verbose",
+      "[SLAVE_BUILD]\\src\\out\\Debug\\browser_tests.isolated.gen.json"
+    ],
+    "cwd": "[SLAVE_BUILD]",
+    "name": "isolate tests",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@json.output@{@@@",
+      "@@@STEP_LOG_LINE@json.output@  \"browser_tests\": \"[dummy hash for browser_tests]\"@@@",
+      "@@@STEP_LOG_LINE@json.output@}@@@",
+      "@@@STEP_LOG_END@json.output@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python",
+      "-u",
+      "RECIPE_MODULE[isolate]\\resources\\find_isolated_tests.py",
+      "--build-dir",
+      "[SLAVE_BUILD]\\src\\out\\Debug",
+      "--output-json",
+      "/path/to/tmp/json"
+    ],
+    "cwd": "[SLAVE_BUILD]",
+    "name": "find isolated tests",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@json.output@{@@@",
+      "@@@STEP_LOG_LINE@json.output@  \"dummy_target_1\": \"[dummy hash for dummy_target_1]\", @@@",
+      "@@@STEP_LOG_LINE@json.output@  \"dummy_target_2\": \"[dummy hash for dummy_target_2]\"@@@",
+      "@@@STEP_LOG_LINE@json.output@}@@@",
+      "@@@STEP_LOG_END@json.output@@@",
+      "@@@SET_BUILD_PROPERTY@swarm_hashes@{\"dummy_target_1\": \"[dummy hash for dummy_target_1]\", \"dummy_target_2\": \"[dummy hash for dummy_target_2]\"}@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python",
+      "-u",
+      "[BUILD]\\scripts\\slave\\chromium\\run_crash_handler.py",
+      "--target",
+      "Debug"
+    ],
+    "cwd": "[SLAVE_BUILD]",
+    "name": "start_crash_service"
+  },
+  {
+    "cmd": [
+      "python",
+      "-u",
+      "\nimport sys\nprint '*.isolated file for target %s is missing' % sys.argv[1]\nsys.exit(1)\n",
+      "browser_tests"
+    ],
+    "cwd": "[SLAVE_BUILD]",
+    "name": "[error] browser_tests",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@python.inline@@@@",
+      "@@@STEP_LOG_LINE@python.inline@import sys@@@",
+      "@@@STEP_LOG_LINE@python.inline@print '*.isolated file for target %s is missing' % sys.argv[1]@@@",
+      "@@@STEP_LOG_LINE@python.inline@sys.exit(1)@@@",
+      "@@@STEP_LOG_END@python.inline@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python",
+      "-u",
+      "\nimport sys\nprint '%s wasn\\'t triggered' % sys.argv[1]\nsys.exit(1)\n",
+      "browser_tests"
+    ],
+    "cwd": "[SLAVE_BUILD]",
+    "name": "[collect error] browser_tests",
+    "~followup_annotations": [
+      "@@@STEP_LOG_LINE@python.inline@@@@",
+      "@@@STEP_LOG_LINE@python.inline@import sys@@@",
+      "@@@STEP_LOG_LINE@python.inline@print '%s wasn\\'t triggered' % sys.argv[1]@@@",
+      "@@@STEP_LOG_LINE@python.inline@sys.exit(1)@@@",
+      "@@@STEP_LOG_END@python.inline@@@"
+    ]
+  },
+  {
+    "cmd": [
+      "python",
+      "-u",
+      "[BUILD]\\scripts\\slave\\process_dumps.py",
+      "--target",
+      "Debug"
+    ],
+    "cwd": "[SLAVE_BUILD]",
+    "name": "process_dumps"
   }
 ]