Delete the PreferenceMACs on profile deletion.

chrome/browser/profiles/profile_manager.h

Index: chrome/browser/profiles/profile_manager.h
diff --git a/chrome/browser/profiles/profile_manager.h b/chrome/browser/profiles/profile_manager.h
index c004505aa87cf8da2603c37b437ba92ebdd72147..538b8458ab9e6691e262e36623bb506aba292cf0 100644
--- a/chrome/browser/profiles/profile_manager.h
+++ b/chrome/browser/profiles/profile_manager.h
@@ -322,6 +322,8 @@ class ProfileManager : public content::NotificationObserver,
   // and marks the new profile as active.
   void FinishDeletingProfile(const base::FilePath& profile_dir,
                              const base::FilePath& new_active_profile_dir);
+  void OnLoadProfileForProfileDeletion(const base::FilePath& profile_dir,
+                                       Profile* profile);
 #endif
 
   // Registers profile with given info. Returns pointer to created ProfileInfo