libyuv: Switch bots over to GN by default.

scripts/slave/recipes/libyuv/libyuv.expected/client_libyuv_mac_asan.json

Index: scripts/slave/recipes/libyuv/libyuv.expected/client_libyuv_mac_asan.json
diff --git a/scripts/slave/recipes/libyuv/libyuv.expected/client_libyuv_mac_asan.json b/scripts/slave/recipes/libyuv/libyuv.expected/client_libyuv_mac_asan.json
index cd732d9f4f074dcbf6521d0c86e369b1361f3e30..a044a0ddc6764d8e36c3c264f74324d919365409 100644
--- a/scripts/slave/recipes/libyuv/libyuv.expected/client_libyuv_mac_asan.json
+++ b/scripts/slave/recipes/libyuv/libyuv.expected/client_libyuv_mac_asan.json
@@ -129,12 +129,26 @@
     "env": {
       "FORCE_MAC_TOOLCHAIN": "1",
       "GOMA_SERVICE_ACCOUNT_JSON_FILE": "/creds/service_accounts/service-account-goma-client.json",
+      "GYP_CHROMIUM_NO_ACTION": "1",
       "GYP_DEFINES": "asan=1 clang=1 component=static_library fastbuild=0 gomadir='[CACHE]/cipd/goma' lsan=1 target_arch=x64 use_goma=1",
       "PATH": "%(PATH)s:RECIPE_PACKAGE_REPO[depot_tools]"
     },
     "name": "gclient runhooks"
   },
   {
+    "cmd": [
+      "python",
+      "-u",
+      "RECIPE_PACKAGE_REPO[depot_tools]/gn.py",
+      "--root=[SLAVE_BUILD]/src",
+      "gen",
+      "//out/Release",
+      "--args=is_clang=true symbol_level=1 is_asan=true is_lsan=true is_debug=false target_cpu=\"x64\" use_goma=true goma_dir=\"[CACHE]/cipd/goma\""
+    ],
+    "cwd": "[SLAVE_BUILD]/src",
+    "name": "gn"
+  },
+  {
     "allow_subannotations": true,
     "cmd": [
       "python",
@@ -191,8 +205,7 @@
       "/creds/service_accounts/service-account-goma-client.json",
       "--goma-dir",
       "[CACHE]/cipd/goma",
-      "--",
-      "All"
+      "--"
     ],
     "env": {
       "FORCE_MAC_TOOLCHAIN": "1",