Simplify HTMLPlugInElement::PluginWrapper to not use SharedPersistent.

third_party/WebKit/Source/bindings/core/v8/ScriptController.h

Index: third_party/WebKit/Source/bindings/core/v8/ScriptController.h
diff --git a/third_party/WebKit/Source/bindings/core/v8/ScriptController.h b/third_party/WebKit/Source/bindings/core/v8/ScriptController.h
index 94203c30a5040019de9bbd7657eed598696dd2ce..901afc394b9646e902fdf793997407fb252f6681 100644
--- a/third_party/WebKit/Source/bindings/core/v8/ScriptController.h
+++ b/third_party/WebKit/Source/bindings/core/v8/ScriptController.h
@@ -50,7 +50,6 @@ class DOMWrapperWorld;
 class Element;
 class KURL;
 class LocalFrame;
-class PluginView;
 class ScriptSourceCode;
 class SecurityOrigin;
 
@@ -117,8 +116,6 @@ class CORE_EXPORT ScriptController final
   // ignored when evaluating resources injected into the DOM.
   bool ShouldBypassMainWorldCSP();
 
-  PassRefPtr<SharedPersistent<v8::Object>> CreatePluginWrapper(PluginView&);
-
   void EnableEval();
   void DisableEval(const String& error_message);