scale method
Scales this size by the given scale factors. The width and height are scaled by {@code sx} and {@code opt_sy} respectively. If {@code opt_sy} is not given, then {@code sx} is used for both the width and height. @param {number} sx The scale factor to use for the width. @param {number=} opt_sy The scale factor to use for the height. @return {!goog.math.Size} This Size object after scaling.
Implementation
void scale(double sx, double sy)
{
top *= sy;
right *= sx;
bottom *= sy;
left *= sx;
}