Have Frame::script() return a reference

Source/core/xml/XMLTreeViewer.cpp

Index: Source/core/xml/XMLTreeViewer.cpp
diff --git a/Source/core/xml/XMLTreeViewer.cpp b/Source/core/xml/XMLTreeViewer.cpp
index d7a1f7bc39a99d1985a67f00d5334976bfa9623e..287f32d2054c7273abd72dde435ece0ece09bfa9 100644
--- a/Source/core/xml/XMLTreeViewer.cpp
+++ b/Source/core/xml/XMLTreeViewer.cpp
@@ -52,9 +52,9 @@ void XMLTreeViewer::transformDocumentToTreeView()
 {
     m_document->setIsViewSource(true);
     String scriptString(reinterpret_cast<const char*>(XMLViewer_js), sizeof(XMLViewer_js));
-    m_document->frame()->script()->executeScriptInMainWorld(scriptString, ScriptController::ExecuteScriptWhenScriptsDisabled);
+    m_document->frame()->script().executeScriptInMainWorld(scriptString, ScriptController::ExecuteScriptWhenScriptsDisabled);
     String noStyleMessage("This XML file does not appear to have any style information associated with it. The document tree is shown below.");
-    m_document->frame()->script()->executeScriptInMainWorld("prepareWebKitXMLViewer('" + noStyleMessage + "');", ScriptController::ExecuteScriptWhenScriptsDisabled);
+    m_document->frame()->script().executeScriptInMainWorld("prepareWebKitXMLViewer('" + noStyleMessage + "');", ScriptController::ExecuteScriptWhenScriptsDisabled);
 
     String cssString(reinterpret_cast<const char*>(XMLViewer_css), sizeof(XMLViewer_css));
     RefPtr<Text> text = m_document->createTextNode(cssString);