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

ui/gfx/box_f.h

 // 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.
 
 #ifndef UI_GFX_BOX_F_H_
 #define UI_GFX_BOX_F_H_
 
 #include "ui/gfx/point3_f.h"
 #include "ui/gfx/vector3d_f.h"
 
@@ skipping 81 matching lines @@
   }
 
   const Point3F& origin() const { return origin_; }
   void set_origin(const Point3F& origin) { origin_ = origin; }
 
   // Expands |this| to contain the given point, if necessary. Please note, even
   // if |this| is empty, after the function |this| will continue to contain its
   // |origin_|.
   void ExpandTo(const Point3F& point);
 
+  // Expands |this| to contain the given box, if necessary. Please note, even
+  // if |this| is empty, after the function |this| will continue to contain its
+  // |origin_|.
+  void ExpandTo(const BoxF& box);
+
  private:
   // Expands the box to contain the two given points. It is required that each
   // component of |min| is less than or equal to the corresponding component in
   // |max|. Precisely, what this function does is ensure that after the function
   // completes, |this| contains origin_, min, max, and origin_ + (width_,
   // height_, depth_), even if the box is empty. Emptiness checks are handled in
   // the public function Union.
   void ExpandTo(const Point3F& min, const Point3F& max);
 
   Point3F origin_;
@@ skipping 34 matching lines @@
               b.y() + v.y(),
               b.z() + v.z(),
               b.width(),
               b.height(),
               b.depth());
 }
 
 }  // namespace gfx
 
 #endif  // UI_GFX_BOX_F_H_