Use AtomicString API directly

Source/core/dom/Element.cpp

Index: Source/core/dom/Element.cpp
diff --git a/Source/core/dom/Element.cpp b/Source/core/dom/Element.cpp
index 1f2fed69eefcbaeb8f6dd79a86194da9d66c3598..6b46d953e5f497d3c05dc1cfee2c7dc0961a18e2 100644
--- a/Source/core/dom/Element.cpp
+++ b/Source/core/dom/Element.cpp
@@ -2608,7 +2608,7 @@ KURL Element::getNonEmptyURLAttribute(const QualifiedName& name) const
 
 int Element::getIntegralAttribute(const QualifiedName& attributeName) const
 {
-    return getAttribute(attributeName).string().toInt();
+    return getAttribute(attributeName).toInt();
 }
 
 void Element::setIntegralAttribute(const QualifiedName& attributeName, int value)
@@ -2616,11 +2616,6 @@ void Element::setIntegralAttribute(const QualifiedName& attributeName, int value
     setAttribute(attributeName, AtomicString::number(value));
 }
 
-unsigned Element::getUnsignedIntegralAttribute(const QualifiedName& attributeName) const
-{
-    return getAttribute(attributeName).string().toUInt();
-}
-
 void Element::setUnsignedIntegralAttribute(const QualifiedName& attributeName, unsigned value)
 {
     // Range restrictions are enforced for unsigned IDL attributes that