Create PendingScriptClient as a separate client interface for PendingScript.

third_party/WebKit/Source/core/dom/PendingScript.h

 /*
  * Copyright (C) 2010 Google, Inc. All Rights Reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 20 matching lines @@
 #include "core/fetch/ResourceOwner.h"
 #include "core/loader/resource/ScriptResource.h"
 #include "platform/MemoryCoordinator.h"
 #include "platform/heap/Handle.h"
 #include "wtf/Noncopyable.h"
 #include "wtf/text/TextPosition.h"
 
 namespace blink {
 
 class Element;
+class PendingScript;
 class ScriptSourceCode;
 
+class CORE_EXPORT PendingScriptClient : public GarbageCollectedMixin {
+ public:
+  virtual ~PendingScriptClient() {}
+
+  // Invoked when the pending script has finished loading. This could be during
+  // |watchForLoad| (if the pending script was already ready), or when the
+  // resource loads (if script streaming is not occurring), or when script
+  // streaming finishes.
+  virtual void pendingScriptFinished(PendingScript*) = 0;
+
+  DEFINE_INLINE_VIRTUAL_TRACE() {}
+};
+
 // A container for an external script which may be loaded and executed.
 //
 // TODO(kochi): The comment below is from pre-oilpan age and may not be correct
 // now.
 // A RefPtr alone does not prevent the underlying Resource from purging its data
 // buffer. This class holds a dummy client open for its lifetime in order to
 // guarantee that the data buffer will not be purged.
 class CORE_EXPORT PendingScript final
     : public GarbageCollectedFinalized<PendingScript>,
       public ResourceOwner<ScriptResource>,
@@ skipping 11 matching lines @@
     m_startingPosition = position;
   }
   void markParserBlockingLoadStartTime();
   // Returns the time the load of this script started blocking the parser, or
   // zero if this script hasn't yet blocked the parser, in
   // monotonicallyIncreasingTime.
   double parserBlockingLoadStartTime() const {
     return m_parserBlockingLoadStartTime;
   }
 
-  void watchForLoad(ScriptResourceClient*);
+  void watchForLoad(PendingScriptClient*);
   void stopWatchingForLoad();
 
   Element* element() const { return m_element.get(); }
   void setElement(Element*);
 
   void setScriptResource(ScriptResource*);
 
-  void notifyFinished(Resource*) override;
-  String debugName() const override { return "PendingScript"; }
-  void notifyAppendData(ScriptResource*) override;
-
   DECLARE_TRACE();
 
   ScriptSourceCode getSource(const KURL& documentURL,
                              bool& errorOccurred) const;
 
   void setStreamer(ScriptStreamer*);
   void streamingFinished();
 
   bool isReady() const;
   bool errorOccurred() const;
 
   void dispose();
 
  private:
   PendingScript(Element*, ScriptResource*);
   PendingScript() = delete;
 
+  // ScriptResourceClient
+  void notifyFinished(Resource*) override;
+  String debugName() const override { return "PendingScript"; }
+  void notifyAppendData(ScriptResource*) override;
+
+  // MemoryCoordinatorClient
   void onMemoryStateChange(MemoryState) override;
 
   bool m_watchingForLoad;
   Member<Element> m_element;
   TextPosition m_startingPosition;  // Only used for inline script tags.
   bool m_integrityFailure;
   double m_parserBlockingLoadStartTime;
 
   Member<ScriptStreamer> m_streamer;
-  Member<ScriptResourceClient> m_client;
+  Member<PendingScriptClient> m_client;
 };
 
 }  // namespace blink
 
 #endif  // PendingScript_h