[chromium-reviews] Add getLanguage function to tabs extension

chrome/browser/renderer_host/render_view_host.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_RENDERER_HOST_RENDER_VIEW_HOST_H_
 #define CHROME_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 188 matching lines @@
   void StartFinding(int request_id,
                     const string16& search_string,
                     bool forward,
                     bool match_case,
                     bool find_next);
 
   // Cancel a pending find operation. If |clear_selection| is true, it will also
   // clear the selection on the focused frame.
   void StopFinding(bool clear_selection);
 
+  // Get the most probable language of the text content in the tab. This sends
+  // a message to the render view to get the content of the page as text. The
+  // caller gets the language via the NotificationService by registering to the
+  // NotificationType TAB_LANGUAGE_DETERMINED.
+  void GetPageLanguage();
+
   // Change the zoom level of a page.
   void Zoom(PageZoom::Function function);
 
   // Change the encoding of the page.
   void SetPageEncoding(const std::wstring& encoding);
 
   // Change the alternate error page URL.  An empty GURL disables the use of
   // alternate error pages.
   void SetAlternateErrorPageURL(const GURL& url);
 
@@ skipping 234 matching lines @@
                                             const GURL& url);
   void OnMsgDidFailProvisionalLoadWithError(bool main_frame,
                                             int error_code,
                                             const GURL& url,
                                             bool showing_repost_interstitial);
   void OnMsgFindReply(int request_id,
                       int number_of_matches,
                       const gfx::Rect& selection_rect,
                       int active_match_ordinal,
                       bool final_update);
+  void OnDeterminePageTextReply(const std::wstring& tab_text);
   void OnMsgUpdateFavIconURL(int32 page_id, const GURL& icon_url);
   void OnMsgDidDownloadFavIcon(int id,
                                const GURL& image_url,
                                bool errored,
                                const SkBitmap& image_data);
   void OnMsgContextMenu(const ContextMenuParams& params);
   void OnMsgOpenURL(const GURL& url, const GURL& referrer,
                     WindowOpenDisposition disposition);
   void OnMsgDidContentsPreferredWidthChange(int pref_width);
   void OnMsgDomOperationResponse(const std::string& json_string,
@@ skipping 137 matching lines @@
 
   // True if the render view can be shut down suddenly.
   bool sudden_termination_allowed_;
 
   NotificationRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderViewHost);
 };
 
 #endif  // CHROME_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_H_