[Translate] Expose whether the user is within a navigation session as part of the infobar delegate

chrome/browser/tab_contents/language_state.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.
 
 #ifndef CHROME_BROWSER_TAB_CONTENTS_LANGUAGE_STATE_H_
 #define CHROME_BROWSER_TAB_CONTENTS_LANGUAGE_STATE_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 26 matching lines @@
   // to translate the page.
   void LanguageDetermined(const std::string& page_language,
                           bool page_translatable);
 
   // Returns the language the current page should be translated to, based on the
   // previous page languages and the transition.  This should be called after
   // the language page has been determined.
   // Returns an empty string if the page should not be auto-translated.
   std::string AutoTranslateTo() const;
 
+  // Returns true if the user is navigating through translated links.
+  bool InTranslateNavigation() const;
+
   // Returns true if the current page in the associated tab has been translated.
   bool IsPageTranslated() const { return original_lang_ != current_lang_; }
 
   const std::string& original_language() const { return original_lang_; }
 
   void set_current_language(const std::string& language) {
     current_lang_ = language;
   }
   const std::string& current_language() const { return current_lang_; }
 
@@ skipping 46 matching lines @@
   // load happens in the page after the user closed the infobar.
   bool translation_declined_;
 
   // Whether the current navigation is a fragment navigation (in page).
   bool in_page_navigation_;
 
   DISALLOW_COPY_AND_ASSIGN(LanguageState);
 };
 
 #endif  // CHROME_BROWSER_TAB_CONTENTS_LANGUAGE_STATE_H_