contacts: Add ContactManagerInterface::GetWeakPtr().

chrome/browser/chromeos/contacts/contact_manager_stub.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_CHROMEOS_CONTACTS_CONTACT_MANAGER_STUB_H_
 #define CHROME_BROWSER_CHROMEOS_CONTACTS_CONTACT_MANAGER_STUB_H_
 
 #include "chrome/browser/chromeos/contacts/contact_manager.h"
 
 #include "base/memory/scoped_vector.h"
 
 namespace contacts {
 
 // ContactManagerInterface implementation that returns a fixed set of contacts.
 // Used for testing.
 class ContactManagerStub : public ContactManagerInterface {
  public:
   explicit ContactManagerStub(Profile* profile);
   virtual ~ContactManagerStub();
 
   // Updates |contacts_|.
   void SetContacts(const ContactPointers& contacts);
 
   // Invokes OnContactsUpdated() on |observers_|.
   void NotifyObserversAboutUpdatedContacts();
 
   // ContactManagerInterface overrides:
+  virtual base::WeakPtr<ContactManagerInterface> GetWeakPtr() OVERRIDE;
   virtual void AddObserver(ContactManagerObserver* observer, Profile* profile)
       OVERRIDE;
   virtual void RemoveObserver(ContactManagerObserver* observer,
                               Profile* profile) OVERRIDE;
   virtual scoped_ptr<ContactPointers> GetAllContacts(Profile* profile) OVERRIDE;
   virtual const Contact* GetContactById(Profile* profile,
                                         const std::string& contact_id) OVERRIDE;
 
  private:
   // Profile expected to be passed to ContactManagerInterface methods.
   // Passing any other profile will result in a crash.
   Profile* profile_;  // not owned
 
   // Observers registered for |profile_|.
   ObserverList<ContactManagerObserver> observers_;
 
   // Contacts that will be returned by GetAllContacts() and GetContactById().
   ScopedVector<Contact> contacts_;
 
+  // Note: This should remain the last member so it'll be destroyed and
+  // invalidate its weak pointers before any other members are destroyed.
+  base::WeakPtrFactory<ContactManagerInterface> weak_ptr_factory_;
+
   DISALLOW_COPY_AND_ASSIGN(ContactManagerStub);
 };
 
 }  // namespace contacts
 
 #endif  // CHROME_BROWSER_CHROMEOS_CONTACTS_CONTACT_MANAGER_STUB_H_