ui: Add non-member Vector2dScale() and Vector3dScale() methods to create scaled vectors

ui/gfx/vector3d_f.cc

 // 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.
 
 #include "ui/gfx/vector3d_f.h"
 
 #include <cmath>
 
 #include "base/stringprintf.h"
 
@@ skipping 58 matching lines @@
   float z = x_ * other.y() - y_ * other.x();
   x_ = x;
   y_ = y;
   z_ = z;
 }
 
 float DotProduct(const Vector3dF& lhs, const Vector3dF& rhs) {
   return lhs.x() * rhs.x() + lhs.y() * rhs.y() + lhs.z() * rhs.z();
 }
 
+Vector3dF ScaleVector3d(const Vector3dF& v,
+                        float x_scale,
+                        float y_scale,
+                        float z_scale) {
+  Vector3dF scaled_v(v);
+  scaled_v.Scale(x_scale, y_scale, z_scale);
+  return scaled_v;
+}
+
 }  // namespace gfx