[HTML Import] Let script block by pending resources created by lifecycle callback

Source/core/html/parser/HTMLScriptRunner.h

Index: Source/core/html/parser/HTMLScriptRunner.h
diff --git a/Source/core/html/parser/HTMLScriptRunner.h b/Source/core/html/parser/HTMLScriptRunner.h
index aae39e2d5df0739d3c905b20cad372c08e28fbab..e193f95facd8b6ec1aeb5349da56213151b44857 100644
--- a/Source/core/html/parser/HTMLScriptRunner.h
+++ b/Source/core/html/parser/HTMLScriptRunner.h
@@ -68,8 +68,13 @@ private:
 
     LocalFrame* frame() const;
 
+    enum PendingScriptType {
+        PendingScriptBlockingParser,
+        PendingScriptDeferred
+    };
+
     void executeParsingBlockingScript();
-    void executePendingScriptAndDispatchEvent(PendingScript&);
+    void executePendingScriptAndDispatchEvent(PendingScript&, PendingScriptType);
     void executeParsingBlockingScripts();
 
     void requestParsingBlockingScript(Element*);