Making LayoutUnit conversions to Float type explicit

Source/core/page/SpatialNavigation.cpp

Index: Source/core/page/SpatialNavigation.cpp
diff --git a/Source/core/page/SpatialNavigation.cpp b/Source/core/page/SpatialNavigation.cpp
index 2c2cc053363f5031e65fabb57afc17c6fc3c0d9f..6a280bced3b8afc304fcebffde65512ec0a2a6a3 100644
--- a/Source/core/page/SpatialNavigation.cpp
+++ b/Source/core/page/SpatialNavigation.cpp
@@ -662,8 +662,8 @@ void distanceDataForNode(FocusType type, const FocusCandidate& current, FocusCan
         return;
     }
 
-    float x = (entryPoint.x() - exitPoint.x()) * (entryPoint.x() - exitPoint.x());
-    float y = (entryPoint.y() - exitPoint.y()) * (entryPoint.y() - exitPoint.y());
+    float x = ((entryPoint.x() - exitPoint.x()) * (entryPoint.x() - exitPoint.x())).toFloat();
+    float y = ((entryPoint.y() - exitPoint.y()) * (entryPoint.y() - exitPoint.y())).toFloat();
 
     float euclidianDistance = sqrt(x + y);