contacts: Add ContactStoreFactory and FakeContactStore.

chrome/browser/chromeos/contacts/contact_store.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_STORE_H_
 #define CHROME_BROWSER_CHROMEOS_CONTACTS_CONTACT_STORE_H_
 
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 
+class Profile;
+
 namespace contacts {
 
 class Contact;
 typedef std::vector<const Contact*> ContactPointers;
 class ContactStoreObserver;
 
 // Interface for classes that store contacts from a particular source.
 class ContactStore {
  public:
   ContactStore() {}
   virtual ~ContactStore() {}
 
+  // Initializes the object.
+  virtual void Init() = 0;
+
   // Appends all (non-deleted) contacts to |contacts_out|.
   virtual void AppendContacts(ContactPointers* contacts_out) = 0;
 
   // Returns the contact identified by |provider_id|.
   // NULL is returned if the contact doesn't exist.
   virtual const Contact* GetContactByProviderId(
       const std::string& provider_id) = 0;
 
   // Adds or removes an observer.
   virtual void AddObserver(ContactStoreObserver* observer) = 0;
   virtual void RemoveObserver(ContactStoreObserver* observer) = 0;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ContactStore);
 };
 
+// Interface for factories that return ContactStore objects of a given type.
+class ContactStoreFactory {
+ public:
+  ContactStoreFactory() {}
+  virtual ~ContactStoreFactory() {}
+
+  // Creates and returns a new, uninitialized ContactStore for |profile|.
+  // TODO(derat): Figure out how this should work if/when there are other
+  // ContactStore implementations that need additional information beyond the
+  // stuff contained in a Profile.
+  virtual ContactStore* CreateContactStore(Profile* profile) = 0;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(ContactStoreFactory);
+};
+
 }  // namespace contacts
 
 #endif  // CHROME_BROWSER_CHROMEOS_CONTACTS_CONTACT_STORE_H_