Fix widget pepper interface crashing after r71544.

webkit/plugins/ppapi/ppb_widget_impl.h

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef WEBKIT_PLUGINS_PPAPI_PPB_WIDGET_IMPL_H_
 #define WEBKIT_PLUGINS_PPAPI_PPB_WIDGET_IMPL_H_
 
 #include "base/basictypes.h"
 #include "base/scoped_ptr.h"
 #include "ppapi/c/pp_rect.h"
@@ skipping 21 matching lines @@
   virtual PPB_Widget_Impl* AsPPB_Widget_Impl();
 
   // PPB_Widget implementation.
   virtual bool Paint(const PP_Rect* rect, PPB_ImageData_Impl* image) = 0;
   virtual bool HandleEvent(const PP_InputEvent* event) = 0;
   bool GetLocation(PP_Rect* location);
   void SetLocation(const PP_Rect* location);
 
   // Notifies the plugin instance that the given rect needs to be repainted.
   void Invalidate(const PP_Rect* dirty);
-  PluginInstance* instance() { return instance_; }
 
  protected:
   virtual void SetLocationInternal(const PP_Rect* location) = 0;
   PP_Rect location() const { return location_; }
 
  private:
-  scoped_refptr<PluginInstance> instance_;
   PP_Rect location_;
 
   DISALLOW_COPY_AND_ASSIGN(PPB_Widget_Impl);
 };
 
 }  // namespace ppapi
 }  // namespace webkit
 
 #endif  // WEBKIT_PLUGINS_PPAPI_PPB_WIDGET_IMPL_H_