Miscellaneous cleanup to reduce number of includes in platform/graphics/

Source/core/platform/graphics/RoundedRect.h

 /*
  * Copyright (C) 2003, 2006, 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2010 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
  *     notice, this list of conditions and the following disclaimer in the
  *     documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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 #ifndef RoundedRect_h
 #define RoundedRect_h
 
-#include "core/platform/graphics/FloatQuad.h"
 #include "core/platform/graphics/IntRect.h"
 
 namespace WebCore {
 
+class FloatQuad;
 
 class RoundedRect {
 public:
     class Radii {
     public:
         Radii() {}
         Radii(const IntSize& topLeft, const IntSize& topRight, const IntSize& bottomLeft, const IntSize& bottomRight)
             : m_topLeft(topLeft)
             , m_topRight(topRight)
             , m_bottomLeft(bottomLeft)
@@ skipping 73 matching lines @@
 
 inline bool operator==(const RoundedRect& a, const RoundedRect& b)
 {
     return a.rect() == b.rect() && a.radii() == b.radii();
 }
 
 
 } // namespace WebCore
 
 #endif // RoundedRect_h