Remove clips where we can show that they are unnecessary.

Source/core/platform/graphics/RoundedRect.h

Index: Source/core/platform/graphics/RoundedRect.h
diff --git a/Source/core/platform/graphics/RoundedRect.h b/Source/core/platform/graphics/RoundedRect.h
index 8dde238afdee6dde41d96c5b9b5a4cb147a3f985..e0d2f6873772e97f9103bda0130f59168980ac79 100644
--- a/Source/core/platform/graphics/RoundedRect.h
+++ b/Source/core/platform/graphics/RoundedRect.h
@@ -82,6 +82,9 @@ public:
     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; }