blink: Cleanup class/struct forward declarations

third_party/WebKit/public/web/WebPluginContainer.h

 /*
  * Copyright (C) 2009 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.
@@ skipping 17 matching lines @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef WebPluginContainer_h
 #define WebPluginContainer_h
 
 #include "../platform/WebCommon.h"
 #include <v8.h>
 
-struct NPObject;
-
 namespace blink {
 
 class WebDocument;
 class WebElement;
 class WebPlugin;
 class WebString;
 class WebURL;
 class WebURLRequest;
 class WebLayer;
 class WebDOMMessageEvent;
@@ skipping 95 matching lines @@
   virtual bool isFullscreenElement() const = 0;
   virtual void cancelFullscreen() = 0;
 
  protected:
   ~WebPluginContainer() {}
 };
 
 }  // namespace blink
 
 #endif