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

components/translate/content/renderer/translate_helper.h

Index: components/translate/content/renderer/translate_helper.h
diff --git a/components/translate/content/renderer/translate_helper.h b/components/translate/content/renderer/translate_helper.h
index 622e7183fc6e8c11a6ab71b4fd263b0f8523f749..4a2da92f337e88110df62715b3ae481bd91af13f 100644
--- a/components/translate/content/renderer/translate_helper.h
+++ b/components/translate/content/renderer/translate_helper.h
@@ -98,6 +98,12 @@ class TranslateHelper : public content::RenderFrameObserver,
   // 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);