Revert of Oilpan: move ScriptLoader to the heap.

Source/core/dom/ScriptRunner.h

Index: Source/core/dom/ScriptRunner.h
diff --git a/Source/core/dom/ScriptRunner.h b/Source/core/dom/ScriptRunner.h
index 6cc75689ccd78c9c4ca4e46ede3f7ac4b5ed5645..e3236475d30eb1d3f5c92d34e6bfc0c1e8177bc0 100644
--- a/Source/core/dom/ScriptRunner.h
+++ b/Source/core/dom/ScriptRunner.h
@@ -69,10 +69,9 @@
     void addPendingAsyncScript(ScriptLoader*);
 
     RawPtrWillBeMember<Document> m_document;
-    WillBeHeapVector<RawPtrWillBeMember<ScriptLoader> > m_scriptsToExecuteInOrder;
-    // http://www.whatwg.org/specs/web-apps/current-work/#set-of-scripts-that-will-execute-as-soon-as-possible
-    WillBeHeapVector<RawPtrWillBeMember<ScriptLoader> > m_scriptsToExecuteSoon;
-    WillBeHeapHashSet<RawPtrWillBeMember<ScriptLoader> > m_pendingAsyncScripts;
+    Vector<ScriptLoader*> m_scriptsToExecuteInOrder;
+    Vector<ScriptLoader*> m_scriptsToExecuteSoon; // http://www.whatwg.org/specs/web-apps/current-work/#set-of-scripts-that-will-execute-as-soon-as-possible
+    HashSet<ScriptLoader*> m_pendingAsyncScripts;
     Timer<ScriptRunner> m_timer;
 };