[protector] Refactoring of --no-protector code.

chrome/browser/protector/prefs_backup_invalid_change.cc

Index: chrome/browser/protector/prefs_backup_invalid_change.cc
diff --git a/chrome/browser/protector/prefs_backup_invalid_change.cc b/chrome/browser/protector/prefs_backup_invalid_change.cc
index 2d865847efd265b258646aa3f5c0ea33da2f47f3..a30ba4c874ccc3b9d18a05cb816a375b308b78c1 100644
--- a/chrome/browser/protector/prefs_backup_invalid_change.cc
+++ b/chrome/browser/protector/prefs_backup_invalid_change.cc
@@ -30,6 +30,7 @@ class PrefsBackupInvalidChange : public BasePrefsChange {
 
   // BasePrefsChange overrides:
   virtual bool Init(Profile* profile) OVERRIDE;
+  virtual void InitWhenDisabled(Profile* profile) OVERRIDE;
   virtual void Apply(Browser* browser) OVERRIDE;
   virtual void Discard(Browser* browser) OVERRIDE;
   virtual void Timeout() OVERRIDE;
@@ -74,6 +75,10 @@ bool PrefsBackupInvalidChange::Init(Profile* profile) {
   return true;
 }
 
+void PrefsBackupInvalidChange::InitWhenDisabled(Profile* profile) {
+  // Nothing to do here since the backup has been already reset.
+}
+
 void PrefsBackupInvalidChange::Apply(Browser* browser) {
   NOTREACHED();
 }