V8: Use default compiler where possible

scripts/slave/recipes/v8.expected/full_client_v8_ports_V8_Linux___arm___sim.json

Index: scripts/slave/recipes/v8.expected/full_client_v8_ports_V8_Linux___arm___sim.json
diff --git a/scripts/slave/recipes/v8.expected/full_client_v8_ports_V8_Linux___arm___sim.json b/scripts/slave/recipes/v8.expected/full_client_v8_ports_V8_Linux___arm___sim.json
index 5ba3387e825dde9ca5b5faf7cfe1d7c9d7d0e530..cad3d76e21dbb4e6f9d0a64e3d5b3e3e5bc6cbc1 100644
--- a/scripts/slave/recipes/v8.expected/full_client_v8_ports_V8_Linux___arm___sim.json
+++ b/scripts/slave/recipes/v8.expected/full_client_v8_ports_V8_Linux___arm___sim.json
@@ -141,7 +141,7 @@
     "cwd": "[SLAVE_BUILD]/v8",
     "env": {
       "GOMA_SERVICE_ACCOUNT_JSON_FILE": "/creds/service_accounts/service-account-goma-client.json",
-      "GYP_DEFINES": "clang=1 gomadir='[CACHE]/cipd/goma' target_arch=ia32 test_isolation_mode=prepare use_goma=1 v8_target_arch=arm",
+      "GYP_DEFINES": "gomadir='[CACHE]/cipd/goma' target_arch=ia32 test_isolation_mode=prepare use_goma=1 v8_target_arch=arm",
       "GYP_GENERATORS": "ninja",
       "PATH": "%(PATH)s:RECIPE_PACKAGE_REPO[depot_tools]"
     },
@@ -217,28 +217,6 @@
     ]
   },
   {
-    "allow_subannotations": true,
-    "cmd": [
-      "python",
-      "-u",
-      "RECIPE_PACKAGE_REPO[build]/scripts/slave/clang_revision.py",
-      "--src-dir",
-      "[SLAVE_BUILD]/v8",
-      "--output-json",
-      "/path/to/tmp/json"
-    ],
-    "env": {
-      "GOMA_SERVICE_ACCOUNT_JSON_FILE": "/creds/service_accounts/service-account-goma-client.json"
-    },
-    "name": "clang_revision",
-    "~followup_annotations": [
-      "@@@STEP_LOG_LINE@json.output@{@@@",
-      "@@@STEP_LOG_LINE@json.output@  \"clang_revision\": \"123456-7\"@@@",
-      "@@@STEP_LOG_LINE@json.output@}@@@",
-      "@@@STEP_LOG_END@json.output@@@"
-    ]
-  },
-  {
     "cmd": [
       "python",
       "-u",
@@ -259,7 +237,7 @@
       "--build-tool",
       "ninja",
       "--compiler",
-      "goma-clang",
+      "goma",
       "--goma-jsonstatus",
       "/path/to/tmp/json",
       "--goma-service-account-json-file",