Revert 35735 - Relanding the language detection code....

chrome/browser/cld_helper.h

-// Copyright (c) 2009 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_CLD_HELPER_H_
-#define CHROME_BROWSER_CLD_HELPER_H_
-
-#include <string>
-
-#include "base/ref_counted.h"
-
-class TabContents;
-
-// The CLDHelper class detects the language of a page, using the toolbar CLD
-// library. (CLD stands for Compact Language Detection.)
-// It should be created and the detection process started on the UI thread.
-// The detection happens on the file thread and
-// TabContents::PageLanguageDetected() is then called on the associated
-// TabContents when the language has been detected.
-class CLDHelper : public base::RefCountedThreadSafe<CLDHelper> {
- public:
-  // |tab_contents| should reference the TabContents the page is related to.
-  // |renderer_process_id|, |page_id| and |page_contents| are the id of the
-  // render process, the id and contents of the page the language is queried.
-  CLDHelper(TabContents* tab_contents,
-            int renderer_process_id,
-            int page_id,
-            const std::wstring& page_content);
-
-  // Starts the process of detecting the language of the page.
-  void DetectLanguage();
-
-  // Cancel any pending language detection, meaning that the TabContents will
-  // not be notified.
-  // This should be on the same thread as DetectLanguage was called.
-  void CancelLanguageDetection();
-
-  int renderer_process_id() const { return renderer_process_id_; }
-
-  int page_id() const { return page_id_; }
-
-  std::string language() const { return language_; }
-
- private:
-  // Private because the class is ref counted.
-  friend class base::RefCountedThreadSafe<CLDHelper>;
-  ~CLDHelper() {}
-
-  // Performs the actual work of detecting the language.
-  void DoDetectLanguage();
-
-  // Invoked on the UI thread once the language has been detected.
-  void DetectionDone();
-
-  // The tab contents for which the language is being detected.
-  TabContents* tab_contents_;
-
-  // The id for the render process the page belongs to.
-  int renderer_process_id_;
-
-  // The id and content of the page for which the language is being detected.
-  int page_id_;
-  std::wstring page_content_;
-
-  // The language that was detected.
-  std::string language_;
-
-  DISALLOW_COPY_AND_ASSIGN(CLDHelper);
-};
-
-#endif  // CHROME_BROWSER_CLD_HELPER_H_
-