Support individual Keychain item deletion

chrome/browser/keychain_mock_mac.h

 // Copyright (c) 2009 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_KEYCHAIN_MOCK_MAC_H_
 #define CHROME_BROWSER_KEYCHAIN_MOCK_MAC_H_
 
 #include <set>
 #include <vector>
 
@@ skipping 15 matching lines @@
   virtual OSStatus ItemCopyAttributesAndData(
       SecKeychainItemRef itemRef, SecKeychainAttributeInfo *info,
       SecItemClass *itemClass, SecKeychainAttributeList **attrList,
       UInt32 *length, void **outData) const;
   // Pass "fail_me" as the data to get errSecAuthFailed.
   virtual OSStatus ItemModifyAttributesAndData(
       SecKeychainItemRef itemRef, const SecKeychainAttributeList *attrList,
       UInt32 length, const void *data) const;
   virtual OSStatus ItemFreeAttributesAndData(SecKeychainAttributeList *attrList,
                                              void *data) const;
+  virtual OSStatus ItemDelete(SecKeychainItemRef itemRef) const;
   virtual OSStatus SearchCreateFromAttributes(
       CFTypeRef keychainOrArray, SecItemClass itemClass,
       const SecKeychainAttributeList *attrList,
       SecKeychainSearchRef *searchRef) const;
   virtual OSStatus SearchCopyNext(SecKeychainSearchRef searchRef,
                                   SecKeychainItemRef *itemRef) const;
   // If there are unused slots in the Mock Keychain's capacity, the new item
   // will use the first free one, otherwise it will stomp the last item.
   // Pass "some.domain.com" as the serverName to get errSecDuplicateItem.
   virtual OSStatus AddInternetPassword(SecKeychainRef keychain,
@@ skipping 85 matching lines @@
   // real mistakes.
   mutable int search_copy_count_;
   mutable int keychain_item_copy_count_;
   mutable int attribute_data_copy_count_;
 
   // Tracks which items (by index) were added with AddInternetPassword.
   mutable std::set<unsigned int> added_via_api_;
 };
 
 #endif  // CHROME_BROWSER_KEYCHAIN_MOCK_MAC_H_