contacts: Don't save deleted contacts to disk.

chrome/browser/chromeos/contacts/contact_map.h

Index: chrome/browser/chromeos/contacts/contact_map.h
diff --git a/chrome/browser/chromeos/contacts/contact_map.h b/chrome/browser/chromeos/contacts/contact_map.h
index a726dddc6f302f9d8fc3a57d39947a11f250b0d6..22de98e7823ecd025466ba709d27c97ea31e3014 100644
--- a/chrome/browser/chromeos/contacts/contact_map.h
+++ b/chrome/browser/chromeos/contacts/contact_map.h
@@ -47,6 +47,9 @@ class ContactMap {
   // isn't present.
   const Contact* Find(const std::string& contact_id) const;
 
+  // Deletes the contact with ID |contact_id|.
+  void Erase(const std::string& contact_id);
+
   // Deletes all contacts.
   void Clear();
 
@@ -54,10 +57,6 @@ class ContactMap {
   void Merge(scoped_ptr<ScopedVector<Contact> > updated_contacts,
              DeletedContactPolicy policy);
 
-  // Returns the maximum |update_time| value stored within a contact in
-  // |contacts_|.
-  base::Time GetMaxUpdateTime() const;
-
  private:
   Map contacts_;