Support individual Keychain item deletion

chrome/browser/keychain_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_MAC_H_
 #define CHROME_BROWSER_KEYCHAIN_MAC_H_
 
 #include <Security/Security.h>
 
 #include "base/basictypes.h"
@@ skipping 16 matching lines @@
       SecItemClass *itemClass, SecKeychainAttributeList **attrList,
       UInt32 *length, void **outData) const;
 
   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;
 
   virtual OSStatus AddInternetPassword(SecKeychainRef keychain,
                                        UInt32 serverNameLength,
@@ skipping 10 matching lines @@
                                        SecKeychainItemRef *itemRef) const;
 
   // Calls CFRelease on the given ref, after checking that |ref| is non-NULL.
   virtual void Free(CFTypeRef ref) const;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(MacKeychain);
 };
 
 #endif  // CHROME_BROWSER_KEYCHAIN_MAC_H_