Have Document::parseQualifiedName() deal with AtomicStrings

Source/core/dom/Document.h

Index: Source/core/dom/Document.h
diff --git a/Source/core/dom/Document.h b/Source/core/dom/Document.h
index 4e83e442691b9f6f57911f38fcd66266701d2ca7..b1cc65c6999f96acd7cbb4abd21dca8c0e7219d0 100644
--- a/Source/core/dom/Document.h
+++ b/Source/core/dom/Document.h
@@ -290,11 +290,11 @@ public:
     PassRefPtr<Comment> createComment(const String& data);
     PassRefPtr<CDATASection> createCDATASection(const String& data, ExceptionState&);
     PassRefPtr<ProcessingInstruction> createProcessingInstruction(const String& target, const String& data, ExceptionState&);
-    PassRefPtr<Attr> createAttribute(const String& name, ExceptionState&);
-    PassRefPtr<Attr> createAttributeNS(const String& namespaceURI, const String& qualifiedName, ExceptionState&, bool shouldIgnoreNamespaceChecks = false);
+    PassRefPtr<Attr> createAttribute(const AtomicString& name, ExceptionState&);
+    PassRefPtr<Attr> createAttributeNS(const AtomicString& namespaceURI, const AtomicString& qualifiedName, ExceptionState&, bool shouldIgnoreNamespaceChecks = false);
     PassRefPtr<Node> importNode(Node* importedNode, ExceptionState& ec) { return importNode(importedNode, true, ec); }
     PassRefPtr<Node> importNode(Node* importedNode, bool deep, ExceptionState&);
-    PassRefPtr<Element> createElementNS(const String& namespaceURI, const String& qualifiedName, ExceptionState&);
+    PassRefPtr<Element> createElementNS(const AtomicString& namespaceURI, const AtomicString& qualifiedName, ExceptionState&);
     PassRefPtr<Element> createElement(const QualifiedName&, bool createdByParser);
 
     PassRefPtr<DOMNamedFlowCollection> webkitGetNamedFlows();
@@ -754,7 +754,7 @@ public:
     // The following breaks a qualified name into a prefix and a local name.
     // It also does a validity check, and returns false if the qualified name
     // is invalid.  It also sets ExceptionCode when name is invalid.
-    static bool parseQualifiedName(const String& qualifiedName, String& prefix, String& localName, ExceptionState&);
+    static bool parseQualifiedName(const AtomicString& qualifiedName, AtomicString& prefix, AtomicString& localName, ExceptionState&);
 
     // Checks to make sure prefix and namespace do not conflict (per DOM Core 3)
     static bool hasValidNamespaceForElements(const QualifiedName&);
@@ -944,7 +944,7 @@ public:
     FastTextAutosizer* fastTextAutosizer();
 
     PassRefPtr<Element> createElement(const AtomicString& localName, const AtomicString& typeExtension, ExceptionState&);
-    PassRefPtr<Element> createElementNS(const AtomicString& namespaceURI, const String& qualifiedName, const AtomicString& typeExtension, ExceptionState&);
+    PassRefPtr<Element> createElementNS(const AtomicString& namespaceURI, const AtomicString& qualifiedName, const AtomicString& typeExtension, ExceptionState&);
     ScriptValue registerElement(WebCore::ScriptState*, const AtomicString& name, ExceptionState&);
     ScriptValue registerElement(WebCore::ScriptState*, const AtomicString& name, const Dictionary& options, ExceptionState&, CustomElement::NameSet validNames = CustomElement::StandardNames);
     CustomElementRegistrationContext* registrationContext() { return m_registrationContext.get(); }