Fixed DCHECK crash for radial gradients with very large values

third_party/WebKit/Source/core/css/CSSGradientValue.cpp

 /*
  * Copyright (C) 2008 Apple Inc.  All rights reserved.
  * Copyright (C) 2015 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
@@ skipping 1141 matching lines @@
             secondRadius = radiusToCorner(secondPoint, floatSize, shape,
                 [] (float a, float b) { return a < b; });
             break;
         default:
             secondRadius = radiusToCorner(secondPoint, floatSize, shape,
                 [] (float a, float b) { return a > b; });
             break;
         }
     }
 
+    if (std::isinf(firstRadius))
+        firstRadius = std::numeric_limits<float>::max();
     DCHECK(std::isfinite(firstRadius));
+
+    if (std::isinf(secondRadius.width()))
+        secondRadius.setWidth(std::numeric_limits<float>::max());
     DCHECK(std::isfinite(secondRadius.width()));
+
+    if (std::isinf(secondRadius.height()))
+        secondRadius.setHeight(std::numeric_limits<float>::max());

[Bugs Nash, 2016/08/18 05:53:21]

Would it be better to put an infinity adjustment in
CSSRadialGradientValue::resolveRadius?

[sashab, 2016/08/18 06:41:34]

Oh wow, because of you saying that I changed this to a 1-line fix :P And it uses
clampTo() instead of this numeric_limits stuff. Nice!!

     DCHECK(std::isfinite(secondRadius.height()));
 
     bool isDegenerate = !secondRadius.width() || !secondRadius.height();
     RefPtr<Gradient> gradient = Gradient::create(firstPoint, firstRadius, secondPoint,
         isDegenerate ? 0 : secondRadius.width(), isDegenerate ? 1 : secondRadius.aspectRatio());
 
     gradient->setSpreadMethod(m_repeating ? SpreadMethodRepeat : SpreadMethodPad);
     gradient->setDrawsInPMColorSpace(true);
 
     // Now add the stops.
@@ skipping 53 matching lines @@
     visitor->trace(m_firstRadius);
     visitor->trace(m_secondRadius);
     visitor->trace(m_shape);
     visitor->trace(m_sizingBehavior);
     visitor->trace(m_endHorizontalSize);
     visitor->trace(m_endVerticalSize);
     CSSGradientValue::traceAfterDispatch(visitor);
 }
 
 } // namespace blink