swarming: isolate defaults

appengine/swarming/proto/config.proto

 // Copyright 2016 The LUCI Authors. All rights reserved.
 // Use of this source code is governed by the Apache v2.0 license that can be
 // found in the LICENSE file.
 
 syntax = "proto2";
 
 // Schema for settings.cfg service config file in luci-config.
 message SettingsCfg {
     // id to inject into pages if applicable.
     optional string google_analytics = 1;
 
     // The number of seconds an old task can be deduped from.
     optional int32 reusable_task_age_secs = 2;
 
     // The amount of time that has to pass before a machine is considered dead.
     optional int32 bot_death_timeout_secs = 3;
 
     // Enable ts_mon based monitoring.
     optional bool enable_ts_monitoring = 4;
+
+    // Configuration for swarming-isolate integration.
+    optional IsolateSettings isolate = 5;
 }
+
+// Configuration for swarming-isolate integration.
+message IsolateSettings {
+    // URL of the default isolate server to use if it is not specified in a
+    // task. Must start with "https://" or "http://".
+    // e.g. "https://isolateserver.appspot.com"
+    optional string default_server = 1;
+
+    // Default namespace to use if it is not specified in a task,
+    // e.g. "default-gzip"
+    optional string default_namespace = 2;
+}