Use AtomicString type more consistently for mimeType / encoding

Source/core/loader/DocumentLoader.h

 /*
  * Copyright (C) 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 63 matching lines @@
         void setFrame(Frame*);
         Frame* frame() const { return m_frame; }
 
         void detachFromFrame();
 
         FrameLoader* frameLoader() const;
 
         unsigned long mainResourceIdentifier() const;
 
         void replaceDocument(const String& source, Document*);
-        DocumentWriter* beginWriting(const String& mimeType, const String& encoding, const KURL& = KURL());
+        DocumentWriter* beginWriting(const AtomicString& mimeType, const AtomicString& encoding, const KURL& = KURL());
         void endWriting(DocumentWriter*);
 
-        String mimeType() const;
+        const AtomicString& mimeType() const;
 
         void setUserChosenEncoding(const String& charset);
 
         const ResourceRequest& originalRequest() const;
         const ResourceRequest& originalRequestCopy() const;
 
         const ResourceRequest& request() const;
         ResourceRequest& request();
 
         ResourceFetcher* fetcher() const { return m_fetcher.get(); }
@@ skipping 14 matching lines @@
         void setCommitted(bool committed) { m_committed = committed; }
         bool isCommitted() const { return m_committed; }
         bool isLoading() const;
         const ResourceResponse& response() const { return m_response; }
         const ResourceError& mainDocumentError() const { return m_mainDocumentError; }
         bool isClientRedirect() const { return m_isClientRedirect; }
         void setIsClientRedirect(bool isClientRedirect) { m_isClientRedirect = isClientRedirect; }
         bool replacesCurrentHistoryItem() const { return m_replacesCurrentHistoryItem; }
         void setReplacesCurrentHistoryItem(bool replacesCurrentHistoryItem) { m_replacesCurrentHistoryItem = replacesCurrentHistoryItem; }
         bool isLoadingInAPISense() const;
-        const String& overrideEncoding() const { return m_overrideEncoding; }
+        const AtomicString& overrideEncoding() const { return m_overrideEncoding; }
 
         bool scheduleArchiveLoad(Resource*, const ResourceRequest&);
         void cancelPendingSubstituteLoad(ResourceLoader*);
 
         enum PolicyCheckLoadType {
             PolicyCheckStandard,
             PolicyCheckFragment
         };
         bool shouldContinueForNavigationPolicy(const ResourceRequest&, PolicyCheckLoadType);
         const NavigationAction& triggeringAction() const { return m_triggeringAction; }
         void setTriggeringAction(const NavigationAction& action) { m_triggeringAction = action; }
 
-        void setOverrideEncoding(const String& encoding) { m_overrideEncoding = encoding; }
+        void setOverrideEncoding(const AtomicString& encoding) { m_overrideEncoding = encoding; }
 
         void setDefersLoading(bool);
 
         void startLoadingMainResource();
         void cancelMainResourceLoad(const ResourceError&);
 
         bool isLoadingMainResource() const { return m_loadingMainResource; }
 
         void stopLoadingSubresources();
 
@@ skipping 12 matching lines @@
         void clearRedirectChain();
         void appendRedirect(const KURL&);
 
     protected:
         DocumentLoader(const ResourceRequest&, const SubstituteData&);
 
         bool m_deferMainResourceDataLoad;
         Vector<KURL> m_redirectChain;
 
     private:
-        static PassRefPtr<DocumentWriter> createWriterFor(Frame*, const Document* ownerDocument, const KURL&, const String& mimeType, const String& encoding, bool userChosen, bool dispatch);
+        static PassRefPtr<DocumentWriter> createWriterFor(Frame*, const Document* ownerDocument, const KURL&, const AtomicString& mimeType, const AtomicString& encoding, bool userChosen, bool dispatch);
 
         void ensureWriter();
-        void ensureWriter(const String& mimeType, const KURL& overridingURL = KURL());
+        void ensureWriter(const AtomicString& mimeType, const KURL& overridingURL = KURL());
 
         Document* document() const;
 
         void setRequest(const ResourceRequest&);
 
         void commitIfReady();
         void commitData(const char* bytes, size_t length);
         void setMainDocumentError(const ResourceError&);
         void clearMainResourceLoader();
         ResourceLoader* mainResourceLoader() const;
@@ skipping 51 matching lines @@
         ResourceRequest m_request;
 
         ResourceResponse m_response;
 
         ResourceError m_mainDocumentError;
 
         bool m_committed;
         bool m_isClientRedirect;
         bool m_replacesCurrentHistoryItem;
 
-        String m_overrideEncoding;
+        AtomicString m_overrideEncoding;
 
         // The action that triggered loading - we keep this around for the
         // benefit of the various policy handlers.
         NavigationAction m_triggeringAction;
 
         OwnPtr<ArchiveResourceCollection> m_archiveResourceCollection;
         RefPtr<MHTMLArchive> m_archive;
 
         bool m_loadingMainResource;
         DocumentLoadTiming m_documentLoadTiming;
 
         double m_timeOfLastDataReceived;
         unsigned long m_identifierForLoadWithoutResourceLoader;
 
         DocumentLoaderTimer m_dataLoadTimer;
 
         friend class ApplicationCacheHost;  // for substitute resource delivery
         OwnPtr<ApplicationCacheHost> m_applicationCacheHost;
     };
 }
 
 #endif // DocumentLoader_h