Remove clips where we can show that they are unnecessary.

Source/core/platform/graphics/RoundedRect.cpp

 /*
  * Copyright (C) 2003, 2006, 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Google Inc. All rights reserved.
  * Copyright (C) 2013 Xidorn Quan (quanxunzhen@gmail.com)
  *
  * 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
  * 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/platform/graphics/RoundedRect.h"
+#include "wtf/Assertions.h"
 
 #include <algorithm>
 
 using namespace std;
 
 namespace WebCore {
 
 bool RoundedRect::Radii::isZero() const
 {
     return m_topLeft.isZero() && m_topRight.isZero() && m_bottomLeft.isZero() && m_bottomRight.isZero();
@@ skipping 103 matching lines @@
     , m_radii(radii)
 {
 }
 
 RoundedRect::RoundedRect(const IntRect& rect, const IntSize& topLeft, const IntSize& topRight, const IntSize& bottomLeft, const IntSize& bottomRight)
     : m_rect(rect)
     , m_radii(topLeft, topRight, bottomLeft, bottomRight)
 {
 }
 
+IntRect RoundedRect::radiusCenterRect() const
+{
+    ASSERT(isRenderable());
+    int minX = m_rect.x() + max(m_radii.topLeft().width(), m_radii.bottomLeft().width());
+    int minY = m_rect.y() + max(m_radii.topLeft().height(), m_radii.topRight().height());
+    int maxX = m_rect.maxX() - max(m_radii.topRight().width(), m_radii.bottomRight().width());
+    int maxY = m_rect.maxY() - max(m_radii.bottomLeft().height(), m_radii.bottomRight().height());
+    return IntRect(minX, minY, maxX - minX, maxY - minY);
+}
+
 void RoundedRect::includeLogicalEdges(const Radii& edges, bool isHorizontal, bool includeLogicalLeftEdge, bool includeLogicalRightEdge)
 {
     m_radii.includeLogicalEdges(edges, isHorizontal, includeLogicalLeftEdge, includeLogicalRightEdge);
 }
 
 void RoundedRect::excludeLogicalEdges(bool isHorizontal, bool excludeLogicalLeftEdge, bool excludeLogicalRightEdge)
 {
     m_radii.excludeLogicalEdges(isHorizontal, excludeLogicalLeftEdge, excludeLogicalRightEdge);
 }
 
@@ skipping 66 matching lines @@
             FloatSize size(bottomRight.width(), bottomRight.height());
             if (!quad.intersectsEllipse(center, size))
                 return false;
         }
     }
 
     return true;
 }
 
 } // namespace WebCore