Add wrappers for the module module

service/module/context.go

-// Copyright 2015 The Chromium Authors. All rights reserved.
+// Copyright 2016 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 info
+package module
 
 import (
         "golang.org/x/net/context"
 )
 
 type key int
 
 var (
-        infoKey       key
-        infoFilterKey key = 1
+        moduleKey       key
+        moduleFilterKey key = 1
 )
 
 // Factory is the function signature for factory methods compatible with
 // SetFactory.
 type Factory func(context.Context) Interface
 
-// Filter is the function signature for a filter GI implementation. It
-// gets the current GI implementation, and returns a new GI implementation
+// Filter is the function signature for a filter module implementation. It gets
+// the current module implementation, and returns a new module implementation
 // backed by the one passed in.
 type Filter func(context.Context, Interface) Interface
 
 // getUnfiltered gets gets the Interface implementation from context without
 // any of the filters applied.
 func getUnfiltered(c context.Context) Interface {
-        if f, ok := c.Value(infoKey).(Factory); ok && f != nil {
+        if f, ok := c.Value(moduleKey).(Factory); ok && f != nil {
                 return f(c)
         }
         return nil
 }
 
 // Get gets the Interface implementation from context.
 func Get(c context.Context) Interface {
         ret := getUnfiltered(c)
         if ret == nil {
                 return nil
         }
         for _, f := range getCurFilters(c) {
                 ret = f(c, ret)
         }
         return ret
 }
 
 // SetFactory sets the function to produce Interface instances, as returned
 // by the Get method.
 func SetFactory(c context.Context, gif Factory) context.Context {
-        return context.WithValue(c, infoKey, gif)
+        return context.WithValue(c, moduleKey, gif)
 }
 
 // Set sets the current Interface object in the context. Useful for testing
 // with a quick mock. This is just a shorthand SetFactory invocation to set
 // a factory which always returns the same object.
 func Set(c context.Context, gi Interface) context.Context {
         return SetFactory(c, func(context.Context) Interface { return gi })
 }
 
 func getCurFilters(c context.Context) []Filter {
-        curFiltsI := c.Value(infoFilterKey)
+        curFiltsI := c.Value(moduleFilterKey)
         if curFiltsI != nil {
                 return curFiltsI.([]Filter)
         }
         return nil
 }
 
 // AddFilters adds Interface filters to the context.
 func AddFilters(c context.Context, filts ...Filter) context.Context {
         if len(filts) == 0 {
                 return c
         }
         cur := getCurFilters(c)
         newFilts := make([]Filter, 0, len(cur)+len(filts))
         newFilts = append(newFilts, getCurFilters(c)...)
         newFilts = append(newFilts, filts...)
-        return context.WithValue(c, infoFilterKey, newFilts)
+        return context.WithValue(c, moduleFilterKey, newFilts)
 }