[translate] Add translate ranker model loader.

net/url_request/url_request_context_getter.h

 // Copyright (c) 2012 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.
 
 #ifndef NET_URL_REQUEST_URL_REQUEST_CONTEXT_GETTER_H_
 #define NET_URL_REQUEST_URL_REQUEST_CONTEXT_GETTER_H_
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/observer_list.h"
@@ skipping 26 matching lines @@
   // URLRequestContext may be used).
   virtual scoped_refptr<base::SingleThreadTaskRunner>
       GetNetworkTaskRunner() const = 0;
 
   // Adds / removes an observer to watch for shutdown of |this|'s context. Must
   // only be called on network thread. May not be called once
   // GetURLRequestContext() starts returning nullptr.
   void AddObserver(URLRequestContextGetterObserver* observer);
   void RemoveObserver(URLRequestContextGetterObserver* observer);
 
+  void AddRef() const;
+  void Release() const;
+
  protected:
   friend class base::RefCountedThreadSafe<URLRequestContextGetter,
                                           URLRequestContextGetterTraits>;
   friend class base::DeleteHelper<URLRequestContextGetter>;
   friend struct URLRequestContextGetterTraits;
 
   URLRequestContextGetter();
   virtual ~URLRequestContextGetter();
 
   // Called to indicate the URLRequestContext is about to be shutdown, so
@@ skipping 41 matching lines @@
 
   URLRequestContext* context_;
   const scoped_refptr<base::SingleThreadTaskRunner> main_task_runner_;
 
   DISALLOW_COPY_AND_ASSIGN(TrivialURLRequestContextGetter);
 };
 
 }  // namespace net
 
 #endif  // NET_URL_REQUEST_URL_REQUEST_CONTEXT_GETTER_H_