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

chrome/browser/cld_helper.cc

-// 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.
-
-#include "chrome/browser/cld_helper.h"
-
-#include "chrome/browser/chrome_thread.h"
-#include "chrome/browser/tab_contents/tab_contents.h"
-#include "chrome/common/notification_service.h"
-
-#if defined(OS_WIN)
-// TODO(port): The compact language detection library works only for Windows.
-#include "third_party/cld/bar/toolbar/cld/i18n/encodings/compact_lang_det/win/cld_unicodetext.h"
-#endif
-
-CLDHelper::CLDHelper(TabContents* tab_contents, int renderer_process_id,
-                     int page_id, const std::wstring& page_content)
-    : tab_contents_(tab_contents),
-      renderer_process_id_(renderer_process_id),
-      page_id_(page_id),
-      page_content_(page_content) {
-}
-
-void CLDHelper::DetectLanguage() {
-  DCHECK(ChromeThread::CurrentlyOn(ChromeThread::UI));
-
-  // Balanced in DetectionDone.
-  AddRef();
-
-  // Do the actual work on the file thread.
-  ChromeThread::PostTask(ChromeThread::FILE, FROM_HERE,
-                         NewRunnableMethod(this, &CLDHelper::DoDetectLanguage));
-}
-
-void CLDHelper::CancelLanguageDetection() {
-  tab_contents_ = NULL;
-}
-
-void CLDHelper::DoDetectLanguage() {
-  if (!tab_contents_) {
-    // If we have already been canceled, no need to perform the detection.
-    Release();  // Balance AddRef from DetectLanguage().
-    return;
-  }
-
-#if defined(OS_WIN)  // Only for windows.
-  int num_languages = 0;
-  bool is_reliable = false;
-
-  const char* language_iso_code = LanguageCodeISO639_1(
-      DetectLanguageOfUnicodeText(NULL, page_content_.c_str(), true,
-                                  &is_reliable, &num_languages, NULL));
-  language_ = language_iso_code;
-#else
-  // TODO(jcampan): port the compact language detection library.
-  NOTIMPLEMENTED();
-#endif
-
-  // Work is done, notify the RenderViewHost on the UI thread.
-  ChromeThread::PostTask(ChromeThread::UI, FROM_HERE,
-                         NewRunnableMethod(this, &CLDHelper::DetectionDone));
-}
-
-void CLDHelper::DetectionDone() {
-  if (tab_contents_)
-    tab_contents_->PageLanguageDetected();
-
-  // Remove the ref we added to ourself in DetectLanguage().
-  Release();
-}