Remove PlatformWidget references

Source/WebCore/plugins/PluginViewBase.h

 /*
  * Copyright (C) 2010 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1.  Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  * notice, this list of conditions and the following disclaimer in the
@@ skipping 62 matching lines @@
     virtual bool supportsKeyboardFocus() const { return false; }
     virtual bool canProcessDrag() const { return false; }
 
     virtual bool shouldAlwaysAutoStart() const { return false; }
 
     virtual bool shouldAllowNavigationFromDrags() const { return false; }
 
     virtual bool isPluginViewBase() const { return true; }
 
 protected:
-    explicit PluginViewBase(PlatformWidget widget = 0) : Widget(widget) { }
+    PluginViewBase() : Widget() { }
 };
 
 inline PluginViewBase* toPluginViewBase(Widget* widget)
 {
     ASSERT(!widget || widget->isPluginViewBase());
     return static_cast<PluginViewBase*>(widget);
 }
 
 inline const PluginViewBase* toPluginViewBase(const Widget* widget)
 {
     ASSERT(!widget || widget->isPluginViewBase());
     return static_cast<const PluginViewBase*>(widget);
 }
 
 // This will catch anyone doing an unnecessary cast.
 void toPluginViewBase(const PluginViewBase*);
 
 } // namespace WebCore
 
 #endif // PluginWidget_h