use staging-goma.chromium.org

staging-goma.chromium.org is avaiable.
use staging-goma.chromium.org instead of
mixer-staging1.endpoints.cxx-compiler-service.cloud.goog

Bug: 920085, 777273
Change-Id: I7029de76163124505d0af1b0027e1afcd42c47e2
Reviewed-on: https://chromium-review.googlesource.com/c/1405219
Auto-Submit: Fumitoshi Ukai <ukai@chromium.org>
Reviewed-by: Yoshisato Yanagisawa <yyanagisawa@chromium.org>
Reviewed-by: Takuto Ikuta <tikuta@chromium.org>
Commit-Queue: Takuto Ikuta <tikuta@chromium.org>
diff --git a/scripts/slave/recipe_modules/chromium/config.py b/scripts/slave/recipe_modules/chromium/config.py
index 88712ce..8d9252f 100644
--- a/scripts/slave/recipe_modules/chromium/config.py
+++ b/scripts/slave/recipe_modules/chromium/config.py
@@ -296,9 +296,7 @@
 @config_ctx()
 def goma_mixer_staging(c):
   c.compile_py.goma_failfast = True
-  # TODO(ukai): use staging-goma.chromium.org http://crbug.com/777273
-  c.env.GOMA_STUBBY_PROXY_IP_ADDRESS = (
-      'mixer-staging1.endpoints.cxx-compiler-service.cloud.goog')
+  c.env.GOMA_STUBBY_PROXY_IP_ADDRESS = 'staging-goma.chromium.org'
   c.env.GOMA_RPC_EXTRA_PARAMS = '?staging'
   c.compile_py.use_autoninja = True
 
diff --git a/scripts/slave/recipe_modules/chromium/tests/get_env.expected/goma_mixer_staging.json b/scripts/slave/recipe_modules/chromium/tests/get_env.expected/goma_mixer_staging.json
index 8e21739..06ec96c 100644
--- a/scripts/slave/recipe_modules/chromium/tests/get_env.expected/goma_mixer_staging.json
+++ b/scripts/slave/recipe_modules/chromium/tests/get_env.expected/goma_mixer_staging.json
@@ -4,7 +4,7 @@
     "env": {
       "FORCE_MAC_TOOLCHAIN": "1",
       "GOMA_RPC_EXTRA_PARAMS": "?staging",
-      "GOMA_STUBBY_PROXY_IP_ADDRESS": "mixer-staging1.endpoints.cxx-compiler-service.cloud.goog"
+      "GOMA_STUBBY_PROXY_IP_ADDRESS": "staging-goma.chromium.org"
     },
     "name": "test"
   },