Remove unused includes from core/{editing,fileapi,history,html}

Source/core/html/canvas/CanvasRenderingContext2D.h

 /*
  * Copyright (C) 2006, 2007, 2009, 2010, 2011, 2012 Apple 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 12 matching lines @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef CanvasRenderingContext2D_h
 #define CanvasRenderingContext2D_h
 
 #include "core/html/canvas/Canvas2DContextAttributes.h"
 #include "core/html/canvas/CanvasPathMethods.h"
 #include "core/html/canvas/CanvasRenderingContext.h"
 #include "core/platform/graphics/Color.h"
-#include "core/platform/graphics/DashArray.h"
 #include "core/platform/graphics/FloatSize.h"
 #include "core/platform/graphics/Font.h"
 #include "core/platform/graphics/GraphicsTypes.h"
 #include "core/platform/graphics/ImageBuffer.h"
 #include "core/platform/graphics/Path.h"
 #include "core/platform/graphics/transforms/AffineTransform.h"
 #include "wtf/HashMap.h"
 #include "wtf/Vector.h"
 #include "wtf/text/WTFString.h"
 
@@ skipping 284 matching lines @@
     Vector<State, 1> m_stateStack;
     unsigned m_unrealizedSaveCount;
     bool m_usesCSSCompatibilityParseMode;
     bool m_hasAlpha;
     MutableStylePropertyMap m_cachedFonts;
 };
 
 } // namespace WebCore
 
 #endif