contacts: Add ContactManager.

chrome/browser/chromeos/contacts/contact_manager_observer.h

Index: chrome/browser/chromeos/contacts/contact_manager_observer.h
diff --git a/chrome/browser/chromeos/contacts/contact_manager_observer.h b/chrome/browser/chromeos/contacts/contact_manager_observer.h
new file mode 100644
index 0000000000000000000000000000000000000000..885378d5abd6566ae7d3938689001d414f47f3f7
--- /dev/null
+++ b/chrome/browser/chromeos/contacts/contact_manager_observer.h
@@ -0,0 +1,29 @@
+// 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_OBSERVER_H_
+#define CHROME_BROWSER_CHROMEOS_CONTACTS_CONTACT_MANAGER_OBSERVER_H_
+
+class Profile;
+
+namespace contacts {
+
+class ContactManager;
+
+// Interface for classes that need to observe changes to ContactManager.
+class ContactManagerObserver {
+ public:
+  ContactManagerObserver() {}
+  virtual ~ContactManagerObserver() {}
+
+  // Called when |profile|'s contacts have been updated.
+  virtual void OnContactsUpdated(ContactManager* manager, Profile* profile) = 0;

[satorux1, 2012/08/03 21:16:22]

Do you need to pass |manager|? Usually observers have a pointer to the object.

[Daniel Erat, 2012/08/03 22:12:07]

You're right; since ContactManager is a singleton there's no reason to tell the
observer where the notification came from.  Done.

+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(ContactManagerObserver);
+};
+
+}  // namespace contacts
+
+#endif  // CHROME_BROWSER_CHROMEOS_CONTACTS_CONTACT_MANAGER_OBSERVER_H_