Stop using WebCore namespace in generated code

Source/modules/navigatorcontentutils/testing/NavigatorContentUtilsClientMock.cpp

 // Copyright 2014 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 "config.h"
 #include "NavigatorContentUtilsClientMock.h"
 
 #include "modules/navigatorcontentutils/NavigatorContentUtilsClient.h"
 #include "platform/weborigin/KURL.h"
 #include "wtf/text/StringHash.h"
@@ skipping 21 matching lines @@
 
     return NavigatorContentUtilsClient::CustomHandlersNew;
 }
 
 void NavigatorContentUtilsClientMock::unregisterProtocolHandler(const String& scheme, const blink::KURL& baseURL,
     const blink::KURL& url)
 {
     m_protocolMap.remove(scheme);
 }
 
-} // WebCore
+} // namespace blink