Move geometric types to a separate, more lightweight target.

ui/gfx/geometry/vector3d_f.h

 // Copyright (c) 2012 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.
 
 // Defines a simple float vector class.  This class is used to indicate a
 // distance in two dimensions between two points. Subtracting two points should
 // produce a vector, and adding a vector to a point produces the point at the
 // vector's distance from the original point.
 
-#ifndef UI_GFX_VECTOR3D_F_H_
-#define UI_GFX_VECTOR3D_F_H_
+#ifndef UI_GFX_GEOMETRY_VECTOR3D_F_H_
+#define UI_GFX_GEOMETRY_VECTOR3D_F_H_
 
 #include <string>
 
+#include "ui/gfx/geometry/vector2d_f.h"
 #include "ui/gfx/gfx_export.h"
-#include "ui/gfx/vector2d_f.h"
 
 namespace gfx {
 
 class GFX_EXPORT Vector3dF {
  public:
   Vector3dF();
   Vector3dF(float x, float y, float z);
 
   explicit Vector3dF(const Vector2dF& other);
 
@@ skipping 87 matching lines @@
                                    float y_scale,
                                    float z_scale);
 
 // Return a vector that is |v| scaled by the given scale factor.
 inline Vector3dF ScaleVector3d(const Vector3dF& v, float scale) {
   return ScaleVector3d(v, scale, scale, scale);
 }
 
 }  // namespace gfx
 
-#endif // UI_GFX_VECTOR3D_F_H_
+#endif // UI_GFX_GEOMETRY_VECTOR3D_F_H_