[mac] Send the system spellchecker language to the renderer.

chrome/browser/spellchecker/spellcheck_platform.h

 // Copyright (c) 2011 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.
 
 // This file defines the interface that any platform-specific spellchecker
 // needs to implement in order to be used by the browser.
 
 #ifndef CHROME_BROWSER_SPELLCHECKER_SPELLCHECK_PLATFORM_H_
 #define CHROME_BROWSER_SPELLCHECKER_SPELLCHECK_PLATFORM_H_
 
@@ skipping 13 matching lines @@
 
 typedef base::Callback<void(
         const std::vector<SpellCheckResult>& /* results */)>
             TextCheckCompleteCallback;
 
 // Get the languages supported by the platform spellchecker and store them in
 // |spellcheck_languages|. Note that they must be converted to
 // Chromium style codes (en-US not en_US). See spellchecker.cc for a full list.
 void GetAvailableLanguages(std::vector<std::string>* spellcheck_languages);
 
+// Returns the language used for spellchecking on the platform.
+std::string GetSpellCheckerLanguage();
+
 // Returns true if there is a platform-specific spellchecker that can be used.
 bool SpellCheckerAvailable();
 
 // Returns true if the platform spellchecker has a spelling panel.
 bool SpellCheckerProvidesPanel();
 
 // Returns true if the platform spellchecker panel is visible.
 bool SpellingPanelVisible();
 
 // Shows the spelling panel if |show| is true and hides it if it is not.
@@ skipping 59 matching lines @@
  public:
   ScopedEnglishLanguageForTest();
   ~ScopedEnglishLanguageForTest();
  private:
   SpellcheckerStateInternal* state_;
 };
 
 }  // namespace spellcheck_platform
 
 #endif  // CHROME_BROWSER_SPELLCHECKER_SPELLCHECK_PLATFORM_H_