Implement document.currentScript

Source/core/dom/Document.cpp

Index: Source/core/dom/Document.cpp
diff --git a/Source/core/dom/Document.cpp b/Source/core/dom/Document.cpp
index 8f398d2b65263971dc690572d63b144481cea209..bc827e935ed966e8c3ff5d55d85d4bbf183eedde 100644
--- a/Source/core/dom/Document.cpp
+++ b/Source/core/dom/Document.cpp
@@ -128,6 +128,7 @@
 #include "core/html/HTMLLinkElement.h"
 #include "core/html/HTMLMapElement.h"
 #include "core/html/HTMLNameCollection.h"
+#include "core/html/HTMLScriptElement.h"
 #include "core/html/HTMLStyleElement.h"
 #include "core/html/HTMLTitleElement.h"
 #include "core/html/PluginDocument.h"
@@ -3932,6 +3933,18 @@ KURL Document::openSearchDescriptionURL()
     return KURL();
 }
 
+void Document::pushCurrentScript(PassRefPtr<HTMLScriptElement> newCurrentScript)
+{
+    ASSERT(newCurrentScript);
+    m_currentScriptStack.append(newCurrentScript);
+}
+
+void Document::popCurrentScript()
+{
+    ASSERT(!m_currentScriptStack.isEmpty());
+    m_currentScriptStack.removeLast();
+}
+
 void Document::applyXSLTransform(ProcessingInstruction* pi)
 {
     UseCounter::count(this, UseCounter::XSLProcessingInstruction);