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

service/datastore/context.go

 // 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 datastore
 
 import (
         "golang.org/x/net/context"
 )
 
 type key int
 
 var (
         rawDatastoreKey       key
         rawDatastoreFilterKey key = 1
 )
 
 // RawFactory is the function signature for factory methods compatible with
 // SetRawFactory.
 type RawFactory func(context.Context) RawInterface
 
-// RawFilter is the function signature for a filter RDS implementation. It
+// RawFilter is the function signature for a RawFilter implementation. It
 // gets the current RDS implementation, and returns a new RDS implementation
 // backed by the one passed in.
 type RawFilter func(context.Context, RawInterface) RawInterface
 
 // getUnfiltered gets gets the RawInterface implementation from context without
 // any of the filters applied.
 func getUnfiltered(c context.Context) RawInterface {
         if f, ok := c.Value(rawDatastoreKey).(RawFactory); ok && f != nil {
                 return f(c)
         }
@@ skipping 16 matching lines @@
 func Get(c context.Context) Interface {
         return &datastoreImpl{GetRaw(c)}
 }
 
 // SetRawFactory sets the function to produce Datastore instances, as returned by
 // the GetRaw method.
 func SetRawFactory(c context.Context, rdsf RawFactory) context.Context {
         return context.WithValue(c, rawDatastoreKey, rdsf)
 }
 
-// SetRaw sets the current Datastore object in the context. Useful for testing with
-// a quick mock. This is just a shorthand SetRawFactory invocation to set a factory
-// which always returns the same object.
+// SetRaw sets the current Datastore object in the context. Useful for testing
+// with a quick mock. This is just a shorthand SetRawFactory invocation to set
+// a factory which always returns the same object.
 func SetRaw(c context.Context, rds RawInterface) context.Context {
         return SetRawFactory(c, func(context.Context) RawInterface { return rds })
 }
 
 func getCurFilters(c context.Context) []RawFilter {
         curFiltsI := c.Value(rawDatastoreFilterKey)
         if curFiltsI != nil {
                 return curFiltsI.([]RawFilter)
         }
         return nil
 }
 
 // AddRawFilters adds RawInterface filters to the context.
 func AddRawFilters(c context.Context, filts ...RawFilter) context.Context {
         if len(filts) == 0 {
                 return c
         }
         cur := getCurFilters(c)
         newFilts := make([]RawFilter, 0, len(cur)+len(filts))
         newFilts = append(newFilts, getCurFilters(c)...)
         newFilts = append(newFilts, filts...)
         return context.WithValue(c, rawDatastoreFilterKey, newFilts)
 }