Move geometric types to a separate, more lightweight target.

ui/gfx/geometry/box_f.h

Index: ui/gfx/geometry/box_f.h
diff --git a/ui/gfx/box_f.h b/ui/gfx/geometry/box_f.h
similarity index 96%
copy from ui/gfx/box_f.h
copy to ui/gfx/geometry/box_f.h
index 73e0972f662318cb10ea6daf9804a584d7e25f64..13fb9d0d47b62120848ab6efdf20126b75e50974 100644
--- a/ui/gfx/box_f.h
+++ b/ui/gfx/geometry/box_f.h
@@ -2,11 +2,11 @@
 // 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_
+#ifndef UI_GFX_GEOMETRY_BOX_F_H_
+#define UI_GFX_GEOMETRY_BOX_F_H_
 
-#include "ui/gfx/point3_f.h"
-#include "ui/gfx/vector3d_f.h"
+#include "ui/gfx/geometry/point3_f.h"
+#include "ui/gfx/geometry/vector3d_f.h"
 
 namespace gfx {
 
@@ -157,4 +157,4 @@ inline BoxF operator+(const BoxF& b, const Vector3dF& v) {
 
 }  // namespace gfx
 
-#endif  // UI_GFX_BOX_F_H_
+#endif  // UI_GFX_GEOMETRY_BOX_F_H_