Drop assert for degenerate cases in FloatRoundedRect::radiusCenterRect()

Source/platform/geometry/FloatRoundedRect.cpp

 /*
  * Copyright (C) 2013 Adobe Systems Incorporated. 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 140 matching lines @@
 #endif
 
 static inline float cornerRectIntercept(float y, const FloatRect& cornerRect)
 {
     ASSERT(cornerRect.height() > 0);
     return cornerRect.width() * sqrt(1 - (y * y) / (cornerRect.height() * cornerRect.height()));
 }
 
 FloatRect FloatRoundedRect::radiusCenterRect() const
 {
-    ASSERT(isRenderable());
-    int minX = m_rect.x() + std::max(m_radii.topLeft().width(), m_radii.bottomLeft().width());
-    int minY = m_rect.y() + std::max(m_radii.topLeft().height(), m_radii.topRight().height());
-    int maxX = m_rect.maxX() - std::max(m_radii.topRight().width(), m_radii.bottomRight().width());
-    int maxY = m_rect.maxY() - std::max(m_radii.bottomLeft().height(), m_radii.bottomRight().height());
-    return FloatRect(minX, minY, maxX - minX, maxY - minY);
+    FloatRectOutsets maximumRadiusInsets(
+        -std::max(m_radii.topLeft().height(), m_radii.topRight().height()),
+        -std::max(m_radii.topRight().width(), m_radii.bottomRight().width()),
+        -std::max(m_radii.bottomLeft().height(), m_radii.bottomRight().height()),
+        -std::max(m_radii.topLeft().width(), m_radii.bottomLeft().width()));
+    FloatRect centerRect(m_rect);
+    centerRect.expand(maximumRadiusInsets);
+    return centerRect;
 }
 
 bool FloatRoundedRect::xInterceptsAtY(float y, float& minXIntercept, float& maxXIntercept) const
 {
     if (y < rect().y() || y >  rect().maxY())
         return false;
 
     if (!isRounded()) {
         minXIntercept = rect().x();
         maxXIntercept = rect().maxX();
@@ skipping 175 matching lines @@
 void FloatRoundedRect::show()
 {
     fprintf(stderr, "FloatRoundedRect:\n rect: ");
     m_rect.show();
     fprintf(stderr, " radii: ");
     m_radii.show();
 }
 #endif
 
 } // namespace blink