Include Page.h in fewer headers

Source/web/PageWidgetDelegate.h

 /*
  * Copyright (C) 2012 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 13 matching lines @@
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * 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 PageWidgetDelegate_h
 #define PageWidgetDelegate_h
 
-#include "core/page/Page.h"
 #include "public/platform/WebCanvas.h"
 #include "public/web/WebWidget.h"
 #include "wtf/OwnPtr.h"
 
 namespace WebCore {
 class LocalFrame;
 class Page;
 }
 
 namespace blink {
@@ skipping 32 matching lines @@
     static void layout(WebCore::Page*);
     static void paint(WebCore::Page*, PageOverlayList*, WebCanvas*, const WebRect&, CanvasBackground);
     static bool handleInputEvent(WebCore::Page*, PageWidgetEventHandler&, const WebInputEvent&);
 
 private:
     PageWidgetDelegate() { }
 };
 
 }
 #endif