Have DOMWindow name getter / setter deal with AtomicStrings

Source/core/frame/DOMWindow.cpp

Index: Source/core/frame/DOMWindow.cpp
diff --git a/Source/core/frame/DOMWindow.cpp b/Source/core/frame/DOMWindow.cpp
index b47293e902d9c8ebd5ce6a10aa88ce4ecdcd3c85..b5109df150392715898e04c97914a4eed0041921 100644
--- a/Source/core/frame/DOMWindow.cpp
+++ b/Source/core/frame/DOMWindow.cpp
@@ -1209,21 +1209,21 @@ unsigned DOMWindow::length() const
     return m_frame->tree().scopedChildCount();
 }
 
-String DOMWindow::name() const
+const AtomicString& DOMWindow::name() const
 {
     if (!m_frame)
-        return String();
+        return nullAtom;
 
     return m_frame->tree().name();

[Inactive, 2013/11/27 00:31:00]

This returns a "const AtomicString&"

 }
 
-void DOMWindow::setName(const String& string)
+void DOMWindow::setName(const AtomicString& name)
 {
     if (!m_frame)
         return;
 
-    m_frame->tree().setName(string);
-    m_frame->loader().client()->didChangeName(string);
+    m_frame->tree().setName(name);

[Inactive, 2013/11/27 00:31:00]

This takes a "const AtomicString&" in argument.

+    m_frame->loader().client()->didChangeName(name);
 }
 
 void DOMWindow::setStatus(const String& string)