Move PlatformScreen, PlatformScreenChromium, and Widget to Source/platform

Source/web/WebPluginContainerImpl.h

 /*
  * Copyright (C) 2009 Google 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:
  *
  *     * 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
@@ skipping 14 matching lines @@
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (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 WebPluginContainerImpl_h
 #define WebPluginContainerImpl_h
 
 #include "WebPluginContainer.h"
-#include "core/platform/Widget.h"
 #include "core/plugins/PluginView.h"
-
+#include "platform/Widget.h"
 #include "wtf/OwnPtr.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/text/WTFString.h"
 #include "wtf/Vector.h"
 
 struct NPObject;
 
 namespace WebCore {
 class GestureEvent;
 class HTMLPlugInElement;
@@ skipping 164 matching lines @@
     // WebPluginContainerImpl is the only subclass of WebPluginContainer.
     return static_cast<WebPluginContainerImpl*>(container);
 }
 
 // This will catch anyone doing an unnecessary cast.
 void toPluginContainerImpl(const WebPluginContainerImpl*);
 
 } // namespace WebKit
 
 #endif