Re-enable DepsCache using GOMA_DEPS_CACHE_FILE

scripts/slave/recipe_modules/chromium/api.py

Index: scripts/slave/recipe_modules/chromium/api.py
diff --git a/scripts/slave/recipe_modules/chromium/api.py b/scripts/slave/recipe_modules/chromium/api.py
index d709175717da6963c05988630ac71c7aa7b37e62..1c0ef2a371db6e158405b660f4ca349f9611742f 100644
--- a/scripts/slave/recipe_modules/chromium/api.py
+++ b/scripts/slave/recipe_modules/chromium/api.py
@@ -184,12 +184,9 @@ class ChromiumApi(recipe_api.RecipeApi):
             '--buildbot-%s' % key, self.m.properties[key]
         ])
 
-    # Use explicit goma deps cache dir if it's set in the path config.
-    # Otherwise use the default one inside build output directory.
-    try:
-      args.extend(['--goma-deps-cache-dir', self.m.path['goma_deps_cache']])
-    except KeyError:
-      pass
+    safe_buildername = re.sub(r'[^a-zA-Z0-9]', '_',
+                              self.m.properties['buildername']) + '.gomadeps'
+    args.extend(['--goma-deps-cache-file', safe_buildername])
 
     if self.c.compile_py.build_args:
       args += ['--build-args', self.c.compile_py.build_args]