Added 'error logs' tab to chrome://translte-internals.

chrome/browser/translate/translate_manager.h

Index: chrome/browser/translate/translate_manager.h
diff --git a/chrome/browser/translate/translate_manager.h b/chrome/browser/translate/translate_manager.h
index 166ac95527ef9f0e037a6bded1321b04bd3215d4..89d55f8e7e682285c5dc3c89d5decef2d1748188 100644
--- a/chrome/browser/translate/translate_manager.h
+++ b/chrome/browser/translate/translate_manager.h
@@ -28,6 +28,7 @@ struct LanguageDetectionDetails;
 struct PageTranslatedDetails;
 class PrefService;
 struct ShortcutConfiguration;
+struct TranslateErrorDetails;
 class TranslateInfoBarDelegate;
 
 namespace content {
@@ -124,6 +125,8 @@ class TranslateManager : public content::NotificationObserver,
    public:
     virtual void OnLanguageDetection(
         const LanguageDetectionDetails& details) = 0;
+    virtual void OnTranslateError(
+        const TranslateErrorDetails& details) = 0;
   };
 
   // Adds/removes observer.
@@ -191,6 +194,9 @@ class TranslateManager : public content::NotificationObserver,
   // Notifies to the observers when a language is detected.
   void NotifyLanguageDetection(const LanguageDetectionDetails& details);
 
+  // Notifies to the observers when translate failed.
+  void NotifyTranslateError(const TranslateErrorDetails& details);
+
   // Returns the language to translate to. The language returned is the
   // first language found in the following list that is supported by the
   // translation service: