Make the LayoutRect->FloatRect constructor explicit.

Source/core/paint/FilterPainter.cpp

Index: Source/core/paint/FilterPainter.cpp
diff --git a/Source/core/paint/FilterPainter.cpp b/Source/core/paint/FilterPainter.cpp
index 19462defc911f61793673cfa0e19a3753b26ed1b..98d2d5b16784931faf63dc9386d9e9421089ccd5 100644
--- a/Source/core/paint/FilterPainter.cpp
+++ b/Source/core/paint/FilterPainter.cpp
@@ -69,10 +69,10 @@ FilterPainter::FilterPainter(DeprecatedPaintLayer& layer, GraphicsContext* conte
             // the layer's filter. See crbug.com/502026.
             if (webFilterOperations->isEmpty())
                 return;
-            context->displayItemList()->createAndAppend<BeginFilterDisplayItem>(*m_layoutObject, imageFilter, rootRelativeBounds, webFilterOperations.release());
+            context->displayItemList()->createAndAppend<BeginFilterDisplayItem>(*m_layoutObject, imageFilter, FloatRect(rootRelativeBounds), webFilterOperations.release());
         }
     } else {
-        BeginFilterDisplayItem filterDisplayItem(*m_layoutObject, imageFilter, rootRelativeBounds);
+        BeginFilterDisplayItem filterDisplayItem(*m_layoutObject, imageFilter, FloatRect(rootRelativeBounds));
         filterDisplayItem.replay(*context);
     }