Make it possible to have <object>'s scriptableObject as a v8 object instead of NPObject.

public/web/WebPlugin.h

 /*
  * Copyright (C) 2009, 2012 Google Inc. All rights reserved.
+ * Copyright (C) 2014 Opera Software ASA. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
  * copyright notice, this list of conditions and the following disclaimer
  * in the documentation and/or other materials provided with the
@@ skipping 17 matching lines @@
 
 #ifndef WebPlugin_h
 #define WebPlugin_h
 
 #include "../platform/WebCanvas.h"
 #include "../platform/WebString.h"
 #include "../platform/WebURL.h"
 #include "WebDragOperation.h"
 #include "WebDragStatus.h"
 #include "WebWidget.h"
+#include <v8.h>
 
 struct NPObject;
 struct _NPP;
 
 namespace blink {
 
 class WebDataSource;
 class WebDragData;
 class WebInputEvent;
 class WebPluginContainer;
 class WebURLResponse;
 struct WebCompositionUnderline;
 struct WebCursorInfo;
 struct WebPluginParams;
 struct WebPrintParams;
 struct WebPoint;
 struct WebRect;
 struct WebTextInputInfo;
 struct WebURLError;
 template <typename T> class WebVector;
 
 class WebPlugin {
 public:
     virtual bool initialize(WebPluginContainer*) = 0;
     virtual void destroy() = 0;
 
     virtual WebPluginContainer* container() const { return 0; }
     virtual void containerDidDetachFromParent() { }
 
-    virtual NPObject* scriptableObject() = 0;
+    virtual NPObject* scriptableObject() { return 0; }
     virtual struct _NPP* pluginNPP() { return 0; }
 
+    // The same as scriptableObject() but allows to expose scriptable interface
+    // through plain v8 object instead of NPObject.
+    // If you override this function, you must return nullptr in scriptableObject().
+    virtual v8::Local<v8::Object> v8ScriptableObject(v8::Isolate*) { return v8::Local<v8::Object>(); }
+
     // Returns true if the form submission value is successfully obtained
     // from the plugin. The value would be associated with the name attribute
     // of the corresponding object element.
     virtual bool getFormValue(WebString&) { return false; }
     virtual bool supportsKeyboardFocus() const { return false; }
     virtual bool supportsEditCommands() const { return false; }
     // Returns true if this plugin supports input method, which implements
     // setComposition() and confirmComposition() below.
     virtual bool supportsInputMethod() const { return false; }
 
@@ skipping 89 matching lines @@
     virtual bool isPlaceholder() { return true; }
     virtual bool shouldPersist() const { return false; }
 
 protected:
     ~WebPlugin() { }
 };
 
 } // namespace blink
 
 #endif