Revert of Oilpan: move ScriptLoader to the heap.

Source/core/dom/ScriptLoader.cpp

Index: Source/core/dom/ScriptLoader.cpp
diff --git a/Source/core/dom/ScriptLoader.cpp b/Source/core/dom/ScriptLoader.cpp
index f9ba83678ea3d127fe0c7633454af2cf406675e3..e51592dab70ce86c91374db04e706e305ec30768 100644
--- a/Source/core/dom/ScriptLoader.cpp
+++ b/Source/core/dom/ScriptLoader.cpp
@@ -78,12 +78,6 @@
     m_pendingScript.stopWatchingForLoad(this);
 }
 
-void ScriptLoader::trace(Visitor* visitor)
-{
-    visitor->trace(m_element);
-    visitor->trace(m_pendingScript);
-}
-
 void ScriptLoader::didNotifySubtreeInsertionsToDocument()
 {
     if (!m_parserInserted)
@@ -372,8 +366,7 @@
     ASSERT(m_pendingScript.resource());
     bool errorOccurred = false;
     ScriptSourceCode source = m_pendingScript.getSource(KURL(), errorOccurred);
-    RefPtrWillBeRawPtr<Element> element = m_pendingScript.releaseElementAndClear();
-    ALLOW_UNUSED_LOCAL(element);
+    RefPtr<Element> element = m_pendingScript.releaseElementAndClear();
     if (errorOccurred) {
         dispatchErrorEvent();
     } else if (!m_resource->wasCanceled()) {
@@ -456,4 +449,4 @@
     return 0;
 }
 
-} // namespace blink
+}