Remove unnecessary Document.h includes in .cpp files

Source/core/rendering/FilterEffectRenderer.cpp

 /*
  * Copyright (C) 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2013 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:
  * 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
@@ skipping 10 matching lines @@
  * 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.
  */
 
 #include "config.h"
 
 #include "core/rendering/FilterEffectRenderer.h"
 
-#include "core/dom/Document.h"
 #include "core/fetch/DocumentResource.h"
 #include "core/fetch/DocumentResourceReference.h"
 #include "core/page/Page.h"
 #include "core/rendering/RenderLayer.h"
 #include "core/rendering/RenderView.h"
 #include "core/rendering/svg/ReferenceFilterBuilder.h"
 #include "core/svg/SVGElement.h"
 #include "core/svg/SVGFilterPrimitiveStandardAttributes.h"
 #include "platform/FloatConversion.h"
 #include "platform/LengthFunctions.h"
@@ skipping 347 matching lines @@
     // Get the filtered output and draw it in place.
     m_savedGraphicsContext->drawImageBuffer(filter->output(), filter->outputRect());
 
     filter->clearIntermediateResults();
 
     return m_savedGraphicsContext;
 }
 
 } // namespace WebCore