Interface update, per-method Contexts.

service/mail/interface.go

 // Copyright 2015 The LUCI Authors. All rights reserved.
 // Use of this source code is governed under the Apache License, Version 2.0
 // that can be found in the LICENSE file.
 
 package mail
 
-// Interface is the interface for all of the mail methods.
+import (
+        "golang.org/x/net/context"
+)
+
+// RawInterface is the interface for all of the mail methods.
 //
 // These replicate the methods found here:
 // https://godoc.org/google.golang.org/appengine/mail
-type Interface interface {
+type RawInterface interface {
         Send(msg *Message) error
         SendToAdmins(msg *Message) error
 
-        Testable() Testable
+        GetTestable() Testable
 }
+
+// Send sends an e-mail message.
+func Send(c context.Context, msg *Message) error {
+        return Raw(c).Send(msg)
+}
+
+// SendToAdmins sends an e-mail message to application administrators.
+func SendToAdmins(c context.Context, msg *Message) error {
+        return Raw(c).SendToAdmins(msg)
+}
+
+// GetTestable returns a testable extension interface, or nil if one is not
+// available.
+func GetTestable(c context.Context) Testable {
+        return Raw(c).GetTestable()
+}