Make sure getAttribute() / setAttribute() callers use AtomicStrings

Source/core/fetch/ResourceFetcher.cpp

 /*
     Copyright (C) 1998 Lars Knoll (knoll@mpi-hd.mpg.de)
     Copyright (C) 2001 Dirk Mueller (mueller@kde.org)
     Copyright (C) 2002 Waldo Bastian (bastian@kde.org)
     Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
     Copyright (C) 2009 Torch Mobile Inc. http://www.torchmobile.com/
 
     This library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Library General Public
     License as published by the Free Software Foundation; either
@@ skipping 1059 matching lines @@
         if (!cachedResource(preload.m_request.resourceRequest().url()))
             requestPreload(preload.m_type, preload.m_request, preload.m_charset);
     }
     m_pendingPreloads.clear();
 }
 
 void ResourceFetcher::requestPreload(Resource::Type type, FetchRequest& request, const String& charset)
 {
     String encoding;
     if (type == Resource::Script || type == Resource::CSSStyleSheet)
-        encoding = charset.isEmpty() ? m_document->charset() : charset;
+        encoding = charset.isEmpty() ? m_document->charset().string() : charset;
 
     request.setCharset(encoding);
     request.setForPreload(true);
 
     ResourcePtr<Resource> resource = requestResource(type, request);
     if (!resource || (m_preloads && m_preloads->contains(resource.get())))
         return;
     TRACE_EVENT_ASYNC_STEP_INTO0("net", "Resource", resource.get(), "Preload");
     resource->increasePreloadCount();
 
@@ skipping 242 matching lines @@
 }
 #endif
 
 const ResourceLoaderOptions& ResourceFetcher::defaultResourceOptions()
 {
     DEFINE_STATIC_LOCAL(ResourceLoaderOptions, options, (SendCallbacks, SniffContent, BufferData, AllowStoredCredentials, ClientRequestedCredentials, AskClientForCrossOriginCredentials, DoSecurityCheck, CheckContentSecurityPolicy, DocumentContext));
     return options;
 }
 
 }