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

Source/core/html/HTMLOptionElement.h

Index: Source/core/html/HTMLOptionElement.h
diff --git a/Source/core/html/HTMLOptionElement.h b/Source/core/html/HTMLOptionElement.h
index f4a89061ea88246af5a492ad9e6e3ccb844d1bbd..f7103f8afd88dbe83aa18de8bee9cecb0a3e6b57 100644
--- a/Source/core/html/HTMLOptionElement.h
+++ b/Source/core/html/HTMLOptionElement.h
@@ -36,7 +36,7 @@ class HTMLSelectElement;
 class HTMLOptionElement FINAL : public HTMLElement {
 public:
     static PassRefPtr<HTMLOptionElement> create(Document&);
-    static PassRefPtr<HTMLOptionElement> createForJSConstructor(Document&, const String& data, const String& value,
+    static PassRefPtr<HTMLOptionElement> createForJSConstructor(Document&, const String& data, const AtomicString& value,
         bool defaultSelected, bool selected, ExceptionState&);
 
     virtual String text() const;
@@ -45,7 +45,7 @@ public:
     int index() const;
 
     String value() const;
-    void setValue(const String&);
+    void setValue(const AtomicString&);
 
     bool selected();
     void setSelected(bool);
@@ -54,7 +54,7 @@ public:
     HTMLSelectElement* ownerSelectElement() const;
 
     String label() const;
-    void setLabel(const String&);
+    void setLabel(const AtomicString&);
 
     bool ownElementDisabled() const { return m_disabled; }