Remove clips where we can show that they are unnecessary.

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.
@@ skipping 64 matching lines @@
 
     explicit RoundedRect(const IntRect&, const Radii& = Radii());
     RoundedRect(int x, int y, int width, int height);
     RoundedRect(const IntRect&, const IntSize& topLeft, const IntSize& topRight, const IntSize& bottomLeft, const IntSize& bottomRight);
 
     const IntRect& rect() const { return m_rect; }
     const Radii& radii() const { return m_radii; }
     bool isRounded() const { return !m_radii.isZero(); }
     bool isEmpty() const { return m_rect.isEmpty(); }
 
+    // Return a quickly computed rect enclosed by the rounded rect.
+    IntRect enclosedRect() const;

[Julien - ping for review, 2013/08/08 21:36:50]

I really think we should specify what we return as it is not the enclosed rect
with the maximum perimeter (the one we would expect). Alternative names:
ellipseCenterRect(), radiusCenterRect(), radiusCenterEnclosedRect().

[jbroman, 2013/08/09 15:34:35]

Changed to radiusCenterRect().

+
     void setRect(const IntRect& rect) { m_rect = rect; }
     void setRadii(const Radii& radii) { m_radii = radii; }
 
     void move(const IntSize& size) { m_rect.move(size); }
     void inflate(int size) { m_rect.inflate(size);  }
     void inflateWithRadii(int size);
     void expandRadii(int size) { m_radii.expand(size); }
     void shrinkRadii(int size) { m_radii.shrink(size); }
 
     void includeLogicalEdges(const Radii& edges, bool isHorizontal, bool includeLogicalLeftEdge, bool includeLogicalRightEdge);
@@ skipping 23 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