recipes: Add a GN flavor.

infra/bots/recipes/swarm_compile.expected/Build-Win-MSVC-x86-Release-GN.json

Index: infra/bots/recipes/swarm_compile.expected/Build-Win-MSVC-x86-Release-GN.json
diff --git a/infra/bots/recipes/swarm_compile.expected/win_retry_failed_compile.json b/infra/bots/recipes/swarm_compile.expected/Build-Win-MSVC-x86-Release-GN.json
similarity index 87%
copy from infra/bots/recipes/swarm_compile.expected/win_retry_failed_compile.json
copy to infra/bots/recipes/swarm_compile.expected/Build-Win-MSVC-x86-Release-GN.json
index 94929b767f7bc0fd6741d6365a456d4b9856736c..6819581eb6b12c6530d34b5a9f77273dea8176ff 100644
--- a/infra/bots/recipes/swarm_compile.expected/win_retry_failed_compile.json
+++ b/infra/bots/recipes/swarm_compile.expected/Build-Win-MSVC-x86-Release-GN.json
@@ -76,7 +76,7 @@
       "-u",
       "[CUSTOM_C:\\_B_WORK]\\skia\\tools\\buildbot_spec.py",
       "/path/to/tmp/json",
-      "Build-Win-MSVC-x86-Debug"
+      "Build-Win-MSVC-x86-Release-GN"
     ],
     "cwd": "[CUSTOM_C:\\_B_WORK]\\skia",
     "name": "exec buildbot_spec.py",
@@ -87,13 +87,14 @@
       "@@@STEP_LOG_LINE@json.output@  ], @@@",
       "@@@STEP_LOG_LINE@json.output@  \"builder_cfg\": {@@@",
       "@@@STEP_LOG_LINE@json.output@    \"compiler\": \"MSVC\", @@@",
-      "@@@STEP_LOG_LINE@json.output@    \"configuration\": \"Debug\", @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"configuration\": \"Release\", @@@",
+      "@@@STEP_LOG_LINE@json.output@    \"extra_config\": \"GN\", @@@",
       "@@@STEP_LOG_LINE@json.output@    \"is_trybot\": false, @@@",
       "@@@STEP_LOG_LINE@json.output@    \"os\": \"Win\", @@@",
       "@@@STEP_LOG_LINE@json.output@    \"role\": \"Build\", @@@",
       "@@@STEP_LOG_LINE@json.output@    \"target_arch\": \"x86\"@@@",
       "@@@STEP_LOG_LINE@json.output@  }, @@@",
-      "@@@STEP_LOG_LINE@json.output@  \"configuration\": \"Debug\", @@@",
+      "@@@STEP_LOG_LINE@json.output@  \"configuration\": \"Release\", @@@",
       "@@@STEP_LOG_LINE@json.output@  \"dm_flags\": [@@@",
       "@@@STEP_LOG_LINE@json.output@    \"--dummy-flags\"@@@",
       "@@@STEP_LOG_LINE@json.output@  ], @@@",
@@ -113,61 +114,58 @@
   },
   {
     "cmd": [
-      "python",
-      "-u",
-      "[CUSTOM_C:\\_B_WORK]\\skia\\infra\\bots\\bootstrap_win_toolchain_json.py",
-      "--win_toolchain_json",
-      "[SLAVE_BUILD]\\src\\build\\win_toolchain.json",
-      "--depot_tools_parent_dir",
-      "[SLAVE_BUILD]"
+      "[CUSTOM_C:\\_B_WORK]\\skia\\bin\\fetch-gn"
     ],
-    "name": "bootstrap win toolchain"
+    "cwd": "[CUSTOM_C:\\_B_WORK]\\skia",
+    "env": {
+      "BUILDTYPE": "Release",
+      "CHROME_HEADLESS": "1",
+      "GYP_DEFINES": "qt_sdk=C:/Qt/4.8.5/ skia_arch_type=x86 skia_warnings_as_errors=1 skia_win_debuggers_path=c:/DbgHelp skia_win_ltcg=0",
+      "PATH": "%(PATH)s;RECIPE_PACKAGE_REPO[depot_tools];RECIPE_PACKAGE_REPO[depot_tools]",
+      "SKIA_OUT": "[CUSTOM_C:\\_B_WORK]\\skia\\out\\Build-Win-MSVC-x86-Release-GN"
+    },
+    "name": "fetch-gn"
   },
   {
     "cmd": [
-      "python",
-      "make.py",
-      "most"
+      "gn.exe",
+      "gen",
+      "[CUSTOM_C:\\_B_WORK]\\skia\\out\\Build-Win-MSVC-x86-Release-GN\\Release",
+      "--args=is_debug=false"
     ],
     "cwd": "[CUSTOM_C:\\_B_WORK]\\skia",
     "env": {
-      "BUILDTYPE": "Debug",
+      "BUILDTYPE": "Release",
       "CHROME_HEADLESS": "1",
-      "CHROME_PATH": "[SLAVE_BUILD]\\src",
       "GYP_DEFINES": "qt_sdk=C:/Qt/4.8.5/ skia_arch_type=x86 skia_warnings_as_errors=1 skia_win_debuggers_path=c:/DbgHelp skia_win_ltcg=0",
       "PATH": "%(PATH)s;RECIPE_PACKAGE_REPO[depot_tools];RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_C:\\_B_WORK]\\skia\\out\\Build-Win-MSVC-x86-Debug"
+      "SKIA_OUT": "[CUSTOM_C:\\_B_WORK]\\skia\\out\\Build-Win-MSVC-x86-Release-GN"
     },
-    "name": "build most",
-    "~followup_annotations": [
-      "step returned non-zero exit code: 1",
-      "@@@STEP_FAILURE@@@"
-    ]
+    "name": "gn_gen"
   },
   {
     "cmd": [
-      "python",
-      "make.py",
-      "most"
+      "ninja",
+      "-C",
+      "[CUSTOM_C:\\_B_WORK]\\skia\\out\\Build-Win-MSVC-x86-Release-GN\\Release"
     ],
     "cwd": "[CUSTOM_C:\\_B_WORK]\\skia",
     "env": {
-      "BUILDTYPE": "Debug",
+      "BUILDTYPE": "Release",
       "CHROME_HEADLESS": "1",
-      "CHROME_PATH": "[SLAVE_BUILD]\\src",
       "GYP_DEFINES": "qt_sdk=C:/Qt/4.8.5/ skia_arch_type=x86 skia_warnings_as_errors=1 skia_win_debuggers_path=c:/DbgHelp skia_win_ltcg=0",
       "PATH": "%(PATH)s;RECIPE_PACKAGE_REPO[depot_tools];RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_C:\\_B_WORK]\\skia\\out\\Build-Win-MSVC-x86-Debug"
+      "SKIA_OUT": "[CUSTOM_C:\\_B_WORK]\\skia\\out\\Build-Win-MSVC-x86-Release-GN"
     },
-    "name": "build most (2)"
+    "name": "compile most"
   },
   {
     "cmd": [
       "python",
       "-u",
       "import errno\nimport glob\nimport os\nimport shutil\nimport sys\n\nsrc = sys.argv[1]\ndst = sys.argv[2]\nbuild_products_whitelist = ['dm', 'dm.exe', 'nanobench', 'nanobench.exe', '*.so', '*.dll', '*.dylib', 'skia_launcher', 'lib/*.so', 'iOSShell.app', 'iOSShell.ipa', 'visualbench', 'visualbench.exe', 'vulkan-1.dll']\n\ntry:\n  os.makedirs(dst)\nexcept OSError as e:\n  if e.errno != errno.EEXIST:\n    raise\n\nfor pattern in build_products_whitelist:\n  path = os.path.join(src, pattern)\n  for f in glob.glob(path):\n    dst_path = os.path.join(dst, os.path.relpath(f, src))\n    if not os.path.isdir(os.path.dirname(dst_path)):\n      os.makedirs(os.path.dirname(dst_path))\n    print 'Copying build product %s to %s' % (f, dst_path)\n    shutil.move(f, dst_path)\n",
-      "[CUSTOM_C:\\_B_WORK]\\skia\\out\\Build-Win-MSVC-x86-Debug\\Debug",
-      "[CUSTOM_[SWARM_OUT_DIR]]\\out\\Debug"
+      "[CUSTOM_C:\\_B_WORK]\\skia\\out\\Build-Win-MSVC-x86-Release-GN\\Release",
+      "[CUSTOM_[SWARM_OUT_DIR]]\\out\\Release"
     ],
     "name": "copy build products",
     "~followup_annotations": [