Remove some unused includes from core/css and core/dom

Source/core/css/CSSValue.cpp

 /*
  * Copyright (C) 2011 Andreas Kling (kling@webkit.org)
  *
  * 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 18 matching lines @@
 
 #include "core/css/CSSAspectRatioValue.h"
 #include "core/css/CSSBorderImageSliceValue.h"
 #include "core/css/CSSCalculationValue.h"
 #include "core/css/CSSCanvasValue.h"
 #include "core/css/CSSCrossfadeValue.h"
 #include "core/css/CSSCursorImageValue.h"
 #include "core/css/CSSFontFaceSrcValue.h"
 #include "core/css/CSSFunctionValue.h"
 #include "core/css/CSSGradientValue.h"
-#include "core/css/CSSImageGeneratorValue.h"
 #include "core/css/CSSImageSetValue.h"
 #include "core/css/CSSImageValue.h"
 #include "core/css/CSSInheritedValue.h"
 #include "core/css/CSSInitialValue.h"
 #include "core/css/CSSLineBoxContainValue.h"
 #include "core/css/CSSPrimitiveValue.h"
 #include "core/css/CSSReflectValue.h"
 #include "core/css/CSSTimingFunctionValue.h"
 #include "core/css/CSSUnicodeRangeValue.h"
 #include "core/css/CSSValueList.h"
@@ skipping 555 matching lines @@
     case SVGPaintClass:
         return static_cast<const SVGPaint*>(this)->cloneForCSSOM();
 #endif
     default:
         ASSERT(!isSubtypeExposedToCSSOM());
         return TextCloneCSSValue::create(classType(), cssText());
     }
 }
 
 }