Create PendingScriptClient as a separate client interface for PendingScript.

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

Index: third_party/WebKit/Source/core/dom/PendingScript.h
diff --git a/third_party/WebKit/Source/core/dom/PendingScript.h b/third_party/WebKit/Source/core/dom/PendingScript.h
index b29c0fa61c3f2c59f8a0b53b6ca9135ff25fb7b6..fa93534bb18539165a05ec5ed1f81f702fd691a5 100644
--- a/third_party/WebKit/Source/core/dom/PendingScript.h
+++ b/third_party/WebKit/Source/core/dom/PendingScript.h
@@ -38,8 +38,22 @@
 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
@@ -71,7 +85,7 @@ class CORE_EXPORT PendingScript final
     return m_parserBlockingLoadStartTime;
   }
 
-  void watchForLoad(ScriptResourceClient*);
+  void watchForLoad(PendingScriptClient*);
   void stopWatchingForLoad();
 
   Element* element() const { return m_element.get(); }
@@ -79,10 +93,6 @@ class CORE_EXPORT PendingScript final
 
   void setScriptResource(ScriptResource*);
 
-  void notifyFinished(Resource*) override;
-  String debugName() const override { return "PendingScript"; }
-  void notifyAppendData(ScriptResource*) override;
-
   DECLARE_TRACE();
 
   ScriptSourceCode getSource(const KURL& documentURL,
@@ -100,6 +110,12 @@ class CORE_EXPORT PendingScript final
   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;
@@ -109,7 +125,7 @@ class CORE_EXPORT PendingScript final
   double m_parserBlockingLoadStartTime;
 
   Member<ScriptStreamer> m_streamer;
-  Member<ScriptResourceClient> m_client;
+  Member<PendingScriptClient> m_client;
 };
 
 }  // namespace blink