WebRTC: Rename trybots and add compile-only configs.

scripts/slave/recipes/webrtc/standalone.expected/tryserver_webrtc_mac_compile_x64_rel.json

Index: scripts/slave/recipes/webrtc/standalone.expected/tryserver_webrtc_mac_compile_x64_rel.json
diff --git a/scripts/slave/recipes/webrtc/standalone.expected/tryserver_webrtc_mac_x64_gn_rel.json b/scripts/slave/recipes/webrtc/standalone.expected/tryserver_webrtc_mac_compile_x64_rel.json
similarity index 90%
copy from scripts/slave/recipes/webrtc/standalone.expected/tryserver_webrtc_mac_x64_gn_rel.json
copy to scripts/slave/recipes/webrtc/standalone.expected/tryserver_webrtc_mac_compile_x64_rel.json
index 5ba1fd21e1910126d16e22e71654e998432d1716..86d1d1f2a1dbfc5a5b9e3025392dbdb6dec26740 100644
--- a/scripts/slave/recipes/webrtc/standalone.expected/tryserver_webrtc_mac_x64_gn_rel.json
+++ b/scripts/slave/recipes/webrtc/standalone.expected/tryserver_webrtc_mac_compile_x64_rel.json
@@ -7,7 +7,7 @@
       "--master",
       "tryserver.webrtc",
       "--builder",
-      "mac_x64_gn_rel",
+      "mac_compile_x64_rel",
       "--slave",
       "slavename",
       "--spec",
@@ -75,25 +75,11 @@
     ],
     "cwd": "[SLAVE_BUILD]",
     "env": {
-      "GYP_CHROMIUM_NO_ACTION": "1",
       "GYP_DEFINES": "clang=1 component=static_library dcheck_always_on=1 fastbuild=1 gomadir='[BUILD]/goma' mac_sdk=10.9 target_arch=x64 use_goma=1"
     },
     "name": "gclient runhooks"
   },
   {
-    "cmd": [
-      "python",
-      "-u",
-      "[DEPOT_TOOLS]/gn.py",
-      "--root=[SLAVE_BUILD]/src",
-      "gen",
-      "//out/Release",
-      "--args=is_debug=false target_cpu=\"x64\" use_goma=true goma_dir=\"[BUILD]/goma\" build_with_chromium=false"
-    ],
-    "cwd": "[SLAVE_BUILD]",
-    "name": "gn"
-  },
-  {
     "allow_subannotations": true,
     "cmd": [
       "python",
@@ -131,7 +117,7 @@
       "--goma-fail-fast",
       "--goma-disable-local-fallback",
       "--",
-      "all"
+      "All"
     ],
     "cwd": "[SLAVE_BUILD]",
     "name": "compile"