Better attempt at an appengine wrapper.

go/src/infra/gae/libs/wrapper/gae/context.go

Index: go/src/infra/gae/libs/wrapper/gae/context.go
diff --git a/go/src/infra/gae/libs/wrapper/gae/context.go b/go/src/infra/gae/libs/wrapper/gae/context.go
new file mode 100644
index 0000000000000000000000000000000000000000..be90906df6140acbb26abb6baaeeed7a9b98028c
--- /dev/null
+++ b/go/src/infra/gae/libs/wrapper/gae/context.go
@@ -0,0 +1,32 @@
+// 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 gae
+
+import (
+	"golang.org/x/net/context"
+
+	"appengine"
+
+	"github.com/mjibson/goon"
+)
+
+// Enable adds the appengine Context to c.
+func Enable(c context.Context, gaeCtx appengine.Context) context.Context {
+	return context.WithValue(c, goonContextKey, goon.FromContext(gaeCtx))
+}
+
+// Use calls ALL of this packages Use* methods on c. This enables all
+// gae/wrapper Get* api's.
+func Use(c context.Context) context.Context {
+	return UseDS(UseMC(UseTQ(UseGI(c))))
+}
+
+type key int
+
+var goonContextKey key
+
+func ctx(c context.Context) *goon.Goon {
+	return c.Value(goonContextKey).(*goon.Goon)
+}