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

ui/gfx/box_f.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/gfx/box_f.h"
 
 #include <algorithm>
 
 #include "base/logging.h"
 #include "base/strings/stringprintf.h"
@@ skipping 32 matching lines @@
   depth_ = max_z - min_z;
 }
 
 void BoxF::Union(const BoxF& box) {
   if (IsEmpty()) {
     *this = box;
     return;
   }
   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);
   return result;
 }
 
 }  // namespace gfx