Make the rest of the services have a similar raw/user interface structure.

service/taskqueue/raw_interface.go

Index: service/taskqueue/raw_interface.go
diff --git a/service/taskqueue/raw_interface.go b/service/taskqueue/raw_interface.go
new file mode 100644
index 0000000000000000000000000000000000000000..a92a05737684fb83e01ffc921582f513771d4d70
--- /dev/null
+++ b/service/taskqueue/raw_interface.go
@@ -0,0 +1,21 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package taskqueue
+
+type RawCB func(error)
+
+type RawTaskCB func(*Task, error)
+
+type RawStatsCB func(*Statistics, error)

[dnj, 2015/08/03 22:37:25]

Exported types need comments.

[iannucci, 2015/08/04 01:21:21]

Done.

+
+// RawInterface is the full interface to the Task Queue service.
+type RawInterface interface {
+	AddMulti(tasks []*Task, queueName string, cb RawTaskCB) error
+	DeleteMulti(tasks []*Task, queueName string, cb RawCB) error
+
+	Purge(queueName string) error

[dnj, 2015/08/03 22:37:25]

Exported methods need comments.

+
+	Stats(queueNames []string, cb RawStatsCB) error
+}