Support individual Keychain item deletion

chrome/browser/keychain_mock_mac.cc

 // 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.
 
 #include "base/logging.h"
 #include "base/time.h"
 #include "chrome/browser/keychain_mock_mac.h"
 
 MockKeychain::MockKeychain(unsigned int item_capacity)
     : item_capacity_(item_capacity), item_count_(0), search_copy_count_(0),
@@ skipping 211 matching lines @@
   return noErr;
 }
 
 OSStatus MockKeychain::ItemFreeAttributesAndData(
     SecKeychainAttributeList *attrList,
     void *data) const {
   --attribute_data_copy_count_;
   return noErr;
 }
 
+OSStatus MockKeychain::ItemDelete(SecKeychainItemRef itemRef) const {
+  unsigned int item_index = reinterpret_cast<unsigned int>(itemRef) - 1;
+  // The mock only supports deleting the last item.
+  if (item_index != item_count_ - 1) {
+    NOTIMPLEMENTED();
+  }
+  --item_count_;
+  return noErr;
+}
+
 OSStatus MockKeychain::SearchCreateFromAttributes(
     CFTypeRef keychainOrArray, SecItemClass itemClass,
     const SecKeychainAttributeList *attrList,
     SecKeychainSearchRef *searchRef) const {
   // Figure out which of our mock items matches, and set up the array we'll use
   // to generate results out of SearchCopyNext.
   remaining_search_results_.clear();
   for (unsigned int mock_item = 0; mock_item < item_count_; ++mock_item) {
     bool mock_item_matches = true;
     for (UInt32 search_attr = 0; search_attr < attrList->count; ++search_attr) {
@@ skipping 128 matching lines @@
   SetTestDataProtocol(index, item_data.protocol);
   SetTestDataString(index, kSecPathItemAttr, item_data.path);
   SetTestDataPort(index, item_data.port);
   SetTestDataString(index, kSecSecurityDomainItemAttr,
                     item_data.security_domain);
   SetTestDataString(index, kSecCreationDateItemAttr, item_data.creation_date);
   SetTestDataString(index, kSecAccountItemAttr, item_data.username);
   SetTestDataPasswordString(index, item_data.password);
   SetTestDataNegativeItem(index, item_data.negative_item);
 }