Remove ~1750 superfluous includes from core

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 17 matching lines @@
 
 #include "core/rendering/FilterEffectRenderer.h"
 
 #include "core/dom/Document.h"
 #include "core/platform/FloatConversion.h"
 #include "core/platform/graphics/ColorSpace.h"
 #include "core/platform/graphics/filters/FEColorMatrix.h"
 #include "core/platform/graphics/filters/FEComponentTransfer.h"
 #include "core/platform/graphics/filters/FEDropShadow.h"
 #include "core/platform/graphics/filters/FEGaussianBlur.h"
-#include "core/platform/graphics/filters/FEMerge.h"
 #include "core/rendering/RenderLayer.h"
 
 #include <algorithm>
 #include <wtf/MathExtras.h>
 
 #include "core/platform/graphics/filters/custom/CustomFilterGlobalContext.h"
-#include "core/platform/graphics/filters/custom/CustomFilterOperation.h"
-#include "core/platform/graphics/filters/custom/CustomFilterProgram.h"
 #include "core/platform/graphics/filters/custom/CustomFilterValidatedProgram.h"
 #include "core/platform/graphics/filters/custom/FECustomFilter.h"
 #include "core/platform/graphics/filters/custom/ValidatedCustomFilterOperation.h"
 #include "core/rendering/RenderView.h"
 
 #if ENABLE(SVG)
 #include "SVGNames.h"
 #include "core/loader/cache/CachedSVGDocument.h"
 #include "core/loader/cache/CachedSVGDocumentReference.h"
 #include "core/platform/graphics/filters/SourceAlpha.h"
@@ skipping 448 matching lines @@
     // Get the filtered output and draw it in place.
     m_savedGraphicsContext->drawImageBuffer(filter->output(), m_renderLayer->renderer()->style()->colorSpace(), filter->outputRect(), CompositeSourceOver);
     
     filter->clearIntermediateResults();
     
     return m_savedGraphicsContext;
 }
 
 } // namespace WebCore