Transfer pending async script loader to new document.

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 4ee1578a0ea1584c6b23c3532f259e81b2ac47a5..33050766c3d1f64c5d7a4623f2cfc45a7012a7a0 100644
--- a/Source/core/dom/ScriptRunner.h
+++ b/Source/core/dom/ScriptRunner.h
@@ -58,6 +58,8 @@ public:
     void notifyScriptReady(ScriptLoader*, ExecutionType);
     void notifyScriptLoadError(ScriptLoader*, ExecutionType);
 
+    void movePendingAsyncScript(ScriptRunner*, ScriptLoader*);
+
     void trace(Visitor*);
 
 private:
@@ -65,6 +67,8 @@ private:
 
     void timerFired(Timer<ScriptRunner>*);
 
+    void addPendingAsyncScript(ScriptLoader*, const PendingScript&);
+
     RawPtrWillBeMember<Document> m_document;
     // FIXME: Oilpan: consider using heap vectors and hash map here;
     // PendingScript does have a (trivial) destructor, however.