Make the FloatSize constructor from an IntSize explicit.

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 1114 matching lines @@
         secondRadius.setWidth(resolveRadius(m_endHorizontalSize.get(), conversionData, &width));
         secondRadius.setHeight(m_endVerticalSize
             ? resolveRadius(m_endVerticalSize.get(), conversionData, &height)
             : secondRadius.width());
     } else {
         EndShapeType shape = (m_shape && m_shape->getValueID() == CSSValueCircle) ||
             (!m_shape && !m_sizingBehavior && m_endHorizontalSize && !m_endVerticalSize)
             ? CircleEndShape
             : EllipseEndShape;
 
+        FloatSize floatSize(size);
         switch (m_sizingBehavior ? m_sizingBehavior->getValueID() : 0) {
         case CSSValueContain:
         case CSSValueClosestSide:
-            secondRadius = radiusToSide(secondPoint, size, shape,
+            secondRadius = radiusToSide(secondPoint, floatSize, shape,
                 [] (float a, float b) { return a < b; });
             break;
         case CSSValueFarthestSide:
-            secondRadius = radiusToSide(secondPoint, size, shape,
+            secondRadius = radiusToSide(secondPoint, floatSize, shape,
                 [] (float a, float b) { return a > b; });
             break;
         case CSSValueClosestCorner:
-            secondRadius = radiusToCorner(secondPoint, size, shape,
+            secondRadius = radiusToCorner(secondPoint, floatSize, shape,
                 [] (float a, float b) { return a < b; });
             break;
         default:
-            secondRadius = radiusToCorner(secondPoint, size, shape,
+            secondRadius = radiusToCorner(secondPoint, floatSize, shape,
                 [] (float a, float b) { return a > b; });
             break;
         }
     }
 
     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);
@@ skipping 56 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