Check |errorCode| of translate.js and notify to Browser

components/translate/content/renderer/translate_helper.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 COMPONENTS_TRANSLATE_CONTENT_RENDERER_TRANSLATE_HELPER_H_
 #define COMPONENTS_TRANSLATE_CONTENT_RENDERER_TRANSLATE_HELPER_H_
 
 #include <memory>
 #include <string>
 
@@ skipping 80 matching lines @@
   // and returns the string returned by the script evaluation if the script was
   // run successfully. Otherwise, returns empty string.
   virtual std::string ExecuteScriptAndGetStringResult(
       const std::string& script);
 
   // Executes the JavaScript code in |script| in the main frame of RenderView.
   // and returns the number returned by the script evaluation if the script was
   // run successfully. Otherwise, returns 0.0.
   virtual double ExecuteScriptAndGetDoubleResult(const std::string& script);
 
+  // Executes the JavaScript code in |script| in the main frame of RenderView.
+  // and returns the integer value returned by the script evaluation if the
+  // script was run successfully. Otherwise, returns |fallback| value.
+  virtual int64_t ExecuteScriptAndGetIntegerResult(const std::string& script,
+                                                   int64_t fallback);
+
  private:
   // Converts language code to the one used in server supporting list.
   static void ConvertLanguageCodeSynonym(std::string* code);
 
   const mojom::ContentTranslateDriverPtr& GetTranslateDriver();
 
   // Cleanups all states and pending callbacks associated with the current
   // running page translation.
   void ResetPage();
 
@@ skipping 42 matching lines @@
 
   // Method factory used to make calls to TranslatePageImpl.
   base::WeakPtrFactory<TranslateHelper> weak_method_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(TranslateHelper);
 };
 
 }  // namespace translate
 
 #endif  // COMPONENTS_TRANSLATE_CONTENT_RENDERER_TRANSLATE_HELPER_H_