Allow the computation of inflated bounds for non matrix transform operations.

ui/gfx/box_f.cc

Index: ui/gfx/box_f.cc
diff --git a/ui/gfx/box_f.cc b/ui/gfx/box_f.cc
index b4191f36bb32b71b806fe1043f13bba2fef13d22..62e755bdc3e2d061a6eab6cdac6a2f0b01777c70 100644
--- a/ui/gfx/box_f.cc
+++ b/ui/gfx/box_f.cc
@@ -50,14 +50,17 @@ void BoxF::Union(const BoxF& box) {
   }
   if (box.IsEmpty())
     return;
-
-  ExpandTo(box.origin(), gfx::Point3F(box.right(), box.bottom(), box.front()));
+  ExpandTo(box);
 }
 
 void BoxF::ExpandTo(const Point3F& point) {
   ExpandTo(point, point);
 }
 
+void BoxF::ExpandTo(const BoxF& box) {
+  ExpandTo(box.origin(), gfx::Point3F(box.right(), box.bottom(), box.front()));
+}
+
 BoxF UnionBoxes(const BoxF& a, const BoxF& b) {
   BoxF result = a;
   result.Union(b);