Remove DeleteTask and convert remaining users.

chrome/browser/protector/protector.h

Index: chrome/browser/protector/protector.h
diff --git a/chrome/browser/protector/protector.h b/chrome/browser/protector/protector.h
index 8f8c2519747b2857c646145c6c5d77167ce4031b..9f0eb8e00194c4d108d0d37ef52aad428430393a 100644
--- a/chrome/browser/protector/protector.h
+++ b/chrome/browser/protector/protector.h
@@ -9,7 +9,7 @@
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
-#include "base/task.h"
+#include "base/message_loop_helpers.h"
 #include "chrome/browser/protector/base_setting_change.h"
 #include "chrome/browser/protector/settings_change_global_error_delegate.h"
 
@@ -48,7 +48,7 @@ class Protector : public SettingsChangeGlobalErrorDelegate {
   virtual void OnRemovedFromProfile() OVERRIDE;
 
  private:
-  friend class DeleteTask<Protector>;
+  friend class base::DeleteHelper<Protector>;
 
   // The object can only be allocated and destroyed on heap.
   virtual ~Protector();