Add TrimmedAppID to info service.

service/info/wrapper.go

Index: service/info/wrapper.go
diff --git a/service/info/wrapper.go b/service/info/wrapper.go
new file mode 100644
index 0000000000000000000000000000000000000000..76f84af2f7e592dc19bc947994af05b6c420ab22
--- /dev/null
+++ b/service/info/wrapper.go
@@ -0,0 +1,30 @@
+// Copyright 2016 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 info
+
+import (
+	"strings"
+
+	"golang.org/x/net/context"
+)
+
+type infoImpl struct {
+	RawInterface
+}
+
+var _ Interface = infoImpl{}
+
+func (i infoImpl) MustNamespace(namespace string) context.Context {

[dnj (Google), 2016/06/11 02:47:38]

Any reason *not* to make this a pointer receiver?

[iannucci, 2016/06/14 00:01:08]

double deref for no reason? additional opportunities for nils?

+	ret, err := i.Namespace(namespace)
+	if err != nil {
+		panic(err)
+	}
+	return ret
+}
+
+func (i infoImpl) TrimmedAppID() string {
+	toks := strings.Split(i.AppID(), ":")
+	return toks[len(toks)-1]
+}