libyuv: Switch bots over to GN by default.

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

Index: scripts/slave/recipes/libyuv/libyuv.expected/tryserver_libyuv_mac_gyp_rel.json
diff --git a/scripts/slave/recipes/libyuv/libyuv.expected/tryserver_libyuv_mac_gn_rel.json b/scripts/slave/recipes/libyuv/libyuv.expected/tryserver_libyuv_mac_gyp_rel.json
similarity index 94%
rename from scripts/slave/recipes/libyuv/libyuv.expected/tryserver_libyuv_mac_gn_rel.json
rename to scripts/slave/recipes/libyuv/libyuv.expected/tryserver_libyuv_mac_gyp_rel.json
index c2e55541dc4d5b3f9f779609455546b687a9898b..5cadd81ac9431e9eae96855ac7a2dfeb0970cfc2 100644
--- a/scripts/slave/recipes/libyuv/libyuv.expected/tryserver_libyuv_mac_gn_rel.json
+++ b/scripts/slave/recipes/libyuv/libyuv.expected/tryserver_libyuv_mac_gyp_rel.json
@@ -135,26 +135,12 @@
     "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": "clang=1 component=static_library dcheck_always_on=1 fastbuild=1 gomadir='[CACHE]/cipd/goma' 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_debug=false target_cpu=\"x64\" use_goma=true goma_dir=\"[CACHE]/cipd/goma\""
-    ],
-    "cwd": "[SLAVE_BUILD]/src",
-    "name": "gn"
-  },
-  {
     "allow_subannotations": true,
     "cmd": [
       "python",
@@ -196,13 +182,13 @@
       "--goma-cache-dir",
       "[GOMA_CACHE]",
       "--buildbot-buildername",
-      "mac_gn_rel",
+      "mac_gyp_rel",
       "--buildbot-mastername",
       "tryserver.libyuv",
       "--buildbot-slavename",
       "slavename",
       "--goma-deps-cache-file",
-      "mac_gn_rel.gomadeps",
+      "mac_gyp_rel.gomadeps",
       "--compiler",
       "goma-clang",
       "--goma-jsonstatus",
@@ -213,8 +199,7 @@
       "[CACHE]/cipd/goma",
       "--goma-fail-fast",
       "--goma-disable-local-fallback",
-      "--",
-      "all"
+      "--"
     ],
     "env": {
       "FORCE_MAC_TOOLCHAIN": "1",