libyuv: Switch bots over to GN by default.

scripts/slave/recipes/libyuv/libyuv.expected/client_libyuv_win32_debug__vs2013_.json

Index: scripts/slave/recipes/libyuv/libyuv.expected/client_libyuv_win32_debug__vs2013_.json
diff --git a/scripts/slave/recipes/libyuv/libyuv.expected/client_libyuv_win32_debug__vs2013_.json b/scripts/slave/recipes/libyuv/libyuv.expected/client_libyuv_win32_debug__vs2013_.json
index e4ce531202f99ce011182745eb3af1150b27c7e2..ef68a486660647f5ed51de8a927b359857f8ce35 100644
--- a/scripts/slave/recipes/libyuv/libyuv.expected/client_libyuv_win32_debug__vs2013_.json
+++ b/scripts/slave/recipes/libyuv/libyuv.expected/client_libyuv_win32_debug__vs2013_.json
@@ -128,6 +128,7 @@
     "cwd": "[SLAVE_BUILD]\\src",
     "env": {
       "GOMA_SERVICE_ACCOUNT_JSON_FILE": "C:\\creds\\service_accounts\\service-account-goma-client.json",
+      "GYP_CHROMIUM_NO_ACTION": "1",
       "GYP_DEFINES": "component=shared_library fastbuild=1 gomadir='[CACHE]\\cipd\\goma' target_arch=ia32 use_goma=1",
       "GYP_MSVS_VERSION": "2013",
       "PATH": "%(PATH)s;RECIPE_PACKAGE_REPO[depot_tools]"
@@ -138,6 +139,19 @@
     "cmd": [
       "python",
       "-u",
+      "RECIPE_PACKAGE_REPO[depot_tools]\\gn.py",
+      "--root=[SLAVE_BUILD]\\src",
+      "gen",
+      "//out/Debug",
+      "--args=symbol_level=2 visual_studio_version=2013 is_debug=true target_cpu=\"x86\" use_goma=true goma_dir=\"[CACHE]\\cipd\\goma\""
+    ],
+    "cwd": "[SLAVE_BUILD]\\src",
+    "name": "gn"
+  },
+  {
+    "cmd": [
+      "python",
+      "-u",
       "RECIPE_PACKAGE_REPO[build]\\scripts\\tools\\runit.py",
       "--show-path",
       "python",
@@ -168,8 +182,7 @@
       "C:\\creds\\service_accounts\\service-account-goma-client.json",
       "--goma-dir",
       "[CACHE]\\cipd\\goma",
-      "--",
-      "All"
+      "--"
     ],
     "env": {
       "GOMA_SERVICE_ACCOUNT_JSON_FILE": "C:\\creds\\service_accounts\\service-account-goma-client.json"