Fixed crash on TranslateManager with multiple profiles.

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 5fba25e4de7e2900faac74d864c25178031898da..7fd73e2f63cddf2c0ed87fdbab49b26cdbb2a14c 100644
--- a/chrome/browser/translate/translate_manager.h
+++ b/chrome/browser/translate/translate_manager.h
@@ -181,7 +181,11 @@ class TranslateManager : public NotificationObserver,
       TabContents* tab);
 
   NotificationRegistrar notification_registrar_;
-  PrefChangeRegistrar pref_change_registrar_;
+
+  // Each PrefChangeRegistrar only tracks a single PrefService, so a map from
+  // each PrefService used to its registrar is needed.
+  typedef std::map<PrefService*, PrefChangeRegistrar*> PrefServiceRegistrarMap;
+  PrefServiceRegistrarMap pref_change_registrars_;
 
   // A map that associates a profile with its parsed "accept languages".
   typedef std::set<std::string> LanguageSet;