swarming: change meaning of inputs_ref

appengine/swarming/swarming_rpcs.py

Index: appengine/swarming/swarming_rpcs.py
diff --git a/appengine/swarming/swarming_rpcs.py b/appengine/swarming/swarming_rpcs.py
index b9f61c49be939eb7e19bb2c80fd987a54a2f3060..2330be2fced2b4004038d229c86dce7584d910cd 100644
--- a/appengine/swarming/swarming_rpcs.py
+++ b/appengine/swarming/swarming_rpcs.py
@@ -90,6 +90,14 @@ class CipdPackage(messages.Message):
   version = messages.StringField(2)
 
 
+class IsolatedOutputsTarget(messages.Message):
+  """Defines a target of isolated outputs."""
+  # The hostname of the isolated server to use.
+  isolatedserver = messages.StringField(2)
+  # Namespace on the isolate server.
+  namespace = messages.StringField(3)
+
+
 class TaskProperties(messages.Message):
   """Important metadata about a particular task."""
   command = messages.StringField(1, repeated=True)
@@ -101,6 +109,7 @@ class TaskProperties(messages.Message):
   idempotent = messages.BooleanField(7)
   inputs_ref = messages.MessageField(FilesRef, 8)
   io_timeout_secs = messages.IntegerField(9)
+  outputs_target = messages.MessageField(IsolatedOutputsTarget, 11)
   packages = messages.MessageField(CipdPackage, 10, repeated=True)