Update HTTPHeaderMap wrappers to use AtomicString type for header values

Source/core/xml/XMLHttpRequest.h

 /*
  *  Copyright (C) 2003, 2006, 2008 Apple Inc. All rights reserved.
  *  Copyright (C) 2005, 2006 Alexey Proskuryakov <ap@nypop.com>
  *  Copyright (C) 2011 Google Inc. All rights reserved.
  *  Copyright (C) 2012 Intel Corporation
  *
  *  This library is free software; you can redistribute it and/or
  *  modify it under the terms of the GNU Lesser General Public
  *  License as published by the Free Software Foundation; either
  *  version 2 of the License, or (at your option) any later version.
@@ skipping 80 matching lines @@
 
     virtual const AtomicString& interfaceName() const OVERRIDE;
     virtual ExecutionContext* executionContext() const OVERRIDE;
 
     const KURL& url() const { return m_url; }
     String statusText(ExceptionState&) const;
     int status(ExceptionState&) const;
     State readyState() const;
     bool withCredentials() const { return m_includeCredentials; }
     void setWithCredentials(bool, ExceptionState&);
-    void open(const String& method, const KURL&, ExceptionState&);
-    void open(const String& method, const KURL&, bool async, ExceptionState&);
-    void open(const String& method, const KURL&, bool async, const String& user, ExceptionState&);
-    void open(const String& method, const KURL&, bool async, const String& user, const String& password, ExceptionState&);
+    void open(const AtomicString& method, const KURL&, ExceptionState&);
+    void open(const AtomicString& method, const KURL&, bool async, ExceptionState&);
+    void open(const AtomicString& method, const KURL&, bool async, const String& user, ExceptionState&);
+    void open(const AtomicString& method, const KURL&, bool async, const String& user, const String& password, ExceptionState&);
     void send(ExceptionState&);
     void send(Document*, ExceptionState&);
     void send(const String&, ExceptionState&);
     void send(Blob*, ExceptionState&);
     void send(DOMFormData*, ExceptionState&);
     void send(ArrayBuffer*, ExceptionState&);
     void send(ArrayBufferView*, ExceptionState&);
     void abort();
-    void setRequestHeader(const AtomicString& name, const String& value, ExceptionState&);
-    void overrideMimeType(const String& override);
+    void setRequestHeader(const AtomicString& name, const AtomicString& value, ExceptionState&);
+    void overrideMimeType(const AtomicString& override);
     String getAllResponseHeaders(ExceptionState&) const;
-    String getResponseHeader(const AtomicString& name, ExceptionState&) const;
+    AtomicString getResponseHeader(const AtomicString& name, ExceptionState&) const;
     ScriptString responseText(ExceptionState&);
     ScriptString responseJSONSource();
     Document* responseXML(ExceptionState&);
     Blob* responseBlob();
     Stream* responseStream();
     unsigned long timeout() const { return m_timeoutMilliseconds; }
     void setTimeout(unsigned long timeout, ExceptionState&);
 
     void sendForInspectorXHRReplay(PassRefPtr<FormData>, ExceptionState&);
 
     // Expose HTTP validation methods for other untrusted requests.
     static bool isAllowedHTTPMethod(const String&);
-    static String uppercaseKnownHTTPMethod(const String&);
+    static AtomicString uppercaseKnownHTTPMethod(const AtomicString&);
     static bool isAllowedHTTPHeader(const String&);
 
     void setResponseType(const String&, ExceptionState&);
     String responseType();
     ResponseTypeCode responseTypeCode() const { return m_responseTypeCode; }
 
     // response attribute has custom getter.
     ArrayBuffer* responseArrayBuffer();
 
     void setLastSendLineNumber(unsigned lineNumber) { m_lastSendLineNumber = lineNumber; }
     void setLastSendURL(const String& url) { m_lastSendURL = url; }
 
     XMLHttpRequestUpload* upload();
 
     DEFINE_ATTRIBUTE_EVENT_LISTENER(readystatechange);
 
 private:
     XMLHttpRequest(ExecutionContext*, PassRefPtr<SecurityOrigin>);
 
     Document* document() const;
     SecurityOrigin* securityOrigin() const;
 
     virtual void didSendData(unsigned long long bytesSent, unsigned long long totalBytesToBeSent);
     virtual void didReceiveResponse(unsigned long identifier, const ResourceResponse&);
     virtual void didReceiveData(const char* data, int dataLength);
     virtual void didFinishLoading(unsigned long identifier, double finishTime);
     virtual void didFail(const ResourceError&);
     virtual void didFailRedirectCheck();
 
-    String responseMIMEType() const;
+    AtomicString responseMIMEType() const;
     bool responseIsXML() const;
 
     bool areMethodAndURLValidForSend();
 
     bool initSend(ExceptionState&);
     void sendBytesData(const void*, size_t, ExceptionState&);
 
-    String getRequestHeader(const AtomicString& name) const;
-    void setRequestHeaderInternal(const AtomicString& name, const String& value);
+    AtomicString getRequestHeader(const AtomicString& name) const;
+    void setRequestHeaderInternal(const AtomicString& name, const AtomicString& value);
 
     // Changes m_state and dispatches a readyStateChange event if new m_state
     // value is different from last one.
     void changeState(State newState);
     void dispatchReadyStateChangeEvent();
 
     void dropProtectionSoon();
     void dropProtection();
     // Clears variables used only while the resource is being loaded.
     void clearVariablesForLoading();
@@ skipping 22 matching lines @@
     // Handles didFail() call triggered by m_loader->cancel().
     void handleDidCancel();
     // Handles didFail() call for timeout.
     void handleDidTimeout();
 
     void handleRequestError(ExceptionCode, const AtomicString&, long long, long long);
 
     OwnPtr<XMLHttpRequestUpload> m_upload;
 
     KURL m_url;
-    String m_method;
+    AtomicString m_method;
     HTTPHeaderMap m_requestHeaders;
     RefPtr<FormData> m_requestEntityBody;
-    String m_mimeTypeOverride;
+    AtomicString m_mimeTypeOverride;
     bool m_async;
     bool m_includeCredentials;
     unsigned long m_timeoutMilliseconds;
     RefPtr<Blob> m_responseBlob;
     RefPtr<Stream> m_responseStream;
 
     RefPtr<ThreadableLoader> m_loader;
     State m_state;
 
     ResourceResponse m_response;
@@ skipping 31 matching lines @@
 
     // An enum corresponding to the allowed string values for the responseType attribute.
     ResponseTypeCode m_responseTypeCode;
     AsyncMethodRunner<XMLHttpRequest> m_dropProtectionRunner;
     RefPtr<SecurityOrigin> m_securityOrigin;
 };
 
 } // namespace WebCore
 
 #endif // XMLHttpRequest_h