Move builder_spec, [dm|nanobench]_flags, builder_name_schema to recipes

infra/bots/recipes/swarm_compile.expected/Build-Ubuntu-Clang-x86_64-Debug-GN.json

 [
   {
     "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",
       "[CUSTOM_/_B_WORK]",
       "511"
     ],
     "name": "makedirs checkout_path",
@@ skipping 54 matching lines @@
       "@@@STEP_LOG_LINE@json.output@      \"revision\": 164710@@@",
       "@@@STEP_LOG_LINE@json.output@    }@@@",
       "@@@STEP_LOG_LINE@json.output@  }@@@",
       "@@@STEP_LOG_LINE@json.output@}@@@",
       "@@@STEP_LOG_END@json.output@@@",
       "@@@SET_BUILD_PROPERTY@got_revision@164710@@@"
     ]
   },
   {
     "cmd": [
-      "python",
-      "-u",
-      "[CUSTOM_/_B_WORK]/skia/tools/buildbot_spec.py",
-      "/path/to/tmp/json",
-      "Build-Ubuntu-Clang-x86_64-Debug-GN"
-    ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
-    "name": "exec buildbot_spec.py",
-    "~followup_annotations": [
-      "@@@STEP_LOG_LINE@json.output@{@@@",
-      "@@@STEP_LOG_LINE@json.output@  \"build_targets\": [@@@",
-      "@@@STEP_LOG_LINE@json.output@    \"most\"@@@",
-      "@@@STEP_LOG_LINE@json.output@  ], @@@",
-      "@@@STEP_LOG_LINE@json.output@  \"builder_cfg\": {@@@",
-      "@@@STEP_LOG_LINE@json.output@    \"compiler\": \"Clang\", @@@",
-      "@@@STEP_LOG_LINE@json.output@    \"configuration\": \"Debug\", @@@",
-      "@@@STEP_LOG_LINE@json.output@    \"extra_config\": \"GN\", @@@",
-      "@@@STEP_LOG_LINE@json.output@    \"is_trybot\": false, @@@",
-      "@@@STEP_LOG_LINE@json.output@    \"os\": \"Ubuntu\", @@@",
-      "@@@STEP_LOG_LINE@json.output@    \"role\": \"Build\", @@@",
-      "@@@STEP_LOG_LINE@json.output@    \"target_arch\": \"x86_64\"@@@",
-      "@@@STEP_LOG_LINE@json.output@  }, @@@",
-      "@@@STEP_LOG_LINE@json.output@  \"configuration\": \"Debug\", @@@",
-      "@@@STEP_LOG_LINE@json.output@  \"dm_flags\": [@@@",
-      "@@@STEP_LOG_LINE@json.output@    \"--dummy-flags\"@@@",
-      "@@@STEP_LOG_LINE@json.output@  ], @@@",
-      "@@@STEP_LOG_LINE@json.output@  \"do_perf_steps\": false, @@@",
-      "@@@STEP_LOG_LINE@json.output@  \"do_test_steps\": false, @@@",
-      "@@@STEP_LOG_LINE@json.output@  \"env\": {@@@",
-      "@@@STEP_LOG_LINE@json.output@    \"CC\": \"/usr/bin/clang\", @@@",
-      "@@@STEP_LOG_LINE@json.output@    \"CXX\": \"/usr/bin/clang++\", @@@",
-      "@@@STEP_LOG_LINE@json.output@    \"GYP_DEFINES\": \"skia_arch_type=x86_64 skia_clang_build=1 skia_warnings_as_errors=1\"@@@",
-      "@@@STEP_LOG_LINE@json.output@  }, @@@",
-      "@@@STEP_LOG_LINE@json.output@  \"nanobench_flags\": [@@@",
-      "@@@STEP_LOG_LINE@json.output@    \"--dummy-flags\"@@@",
-      "@@@STEP_LOG_LINE@json.output@  ], @@@",
-      "@@@STEP_LOG_LINE@json.output@  \"upload_dm_results\": true, @@@",
-      "@@@STEP_LOG_LINE@json.output@  \"upload_perf_results\": false@@@",
-      "@@@STEP_LOG_LINE@json.output@}@@@",
-      "@@@STEP_LOG_END@json.output@@@"
-    ]
-  },
-  {
-    "cmd": [
       "[CUSTOM_/_B_WORK]/skia/bin/fetch-gn"
     ],
     "cwd": "[CUSTOM_/_B_WORK]/skia",
     "env": {
       "BUILDTYPE": "Debug",
       "CC": "/usr/bin/clang",
       "CHROME_HEADLESS": "1",
       "CXX": "/usr/bin/clang++",
       "GYP_DEFINES": "skia_arch_type=x86_64 skia_clang_build=1 skia_warnings_as_errors=1",
       "PATH": "%(PATH)s:RECIPE_PACKAGE_REPO[depot_tools]:RECIPE_PACKAGE_REPO[depot_tools]",
@@ skipping 109 matching lines @@
       "@@@STEP_LOG_LINE@python.inline@    shutil.move(f, dst_path)@@@",
       "@@@STEP_LOG_END@python.inline@@@"
     ]
   },
   {
     "name": "$result",
     "recipe_result": null,
     "status_code": 0
   }
 ]