gfx: Do the ToEnclosingRect in double precision.

ui/gfx/geometry/rect_conversions.cc

Index: ui/gfx/geometry/rect_conversions.cc
diff --git a/ui/gfx/geometry/rect_conversions.cc b/ui/gfx/geometry/rect_conversions.cc
index 412041a4163952c0e9cb60f7839a08c5b19120f9..b4ef3d44ec9c4e434b93ae64531cde2f6197014e 100644
--- a/ui/gfx/geometry/rect_conversions.cc
+++ b/ui/gfx/geometry/rect_conversions.cc
@@ -21,12 +21,14 @@ Rect ToEnclosingRect(const RectF& rect) {
       rect.width() == 0
           ? 0
           : std::max(
-                ToCeiledInt(static_cast<float>(ToCeiledInt(max_x)) - min_x), 0);
+                ToCeiledInt(static_cast<double>(ToCeiledInt(max_x)) - min_x),
+                0);
   int height =
       rect.height() == 0
           ? 0
           : std::max(
-                ToCeiledInt(static_cast<float>(ToCeiledInt(max_y)) - min_y), 0);
+                ToCeiledInt(static_cast<double>(ToCeiledInt(max_y)) - min_y),
+                0);
   return Rect(min_x, min_y, width, height);
 }