Introduce TranslateService and TranslateDownloadManager

chrome/browser/translate/chrome_translate_delegate.h

-// Copyright 2014 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 CHROME_BROWSER_TRANSLATE_CHROME_TRANSLATE_DELEGATE_H_
-#define CHROME_BROWSER_TRANSLATE_CHROME_TRANSLATE_DELEGATE_H_
-
-#include "components/translate/core/browser/translate_delegate.h"
-
-#include <string>
-
-#include "base/compiler_specific.h"
-
-template <typename T>
-struct DefaultSingletonTraits;
-
-namespace net {
-class URLRequestContextGetter;
-}
-
-// Chrome embedder for the translate component.
-class ChromeTranslateDelegate : public TranslateDelegate {
- public:
-  // Returns the singleton instance.
-  // TODO(droger): Improve the ownership model. See http://crbug.com/332736.
-  static ChromeTranslateDelegate* GetInstance();
-
-  virtual ~ChromeTranslateDelegate();
-
- private:
-  friend struct DefaultSingletonTraits<ChromeTranslateDelegate>;
-  ChromeTranslateDelegate();
-
-  // TranslateDelegate methods.
-  virtual net::URLRequestContextGetter* GetURLRequestContext() OVERRIDE;
-};
-
-#endif  // CHROME_BROWSER_TRANSLATE_CHROME_TRANSLATE_DELEGATE_H_