B2G/gecko/browser/components/tabview/modules/utils.jsm
// Copies the values of the given <Rect> into this rectangle.
Copies the values of the given  into this rectangle.
Copies the values of the given into this rectangle .
function Rect_copy(a) {
    this.left = a.left;
    this.top = a.top;
    this.width = a.width;
    this.height = a.height;
  }
function Rect_copy ( a ) { this . left = a . left ; this . top = a . top ; this . width = a . width ; this . height = a . height ; }
Copies the values of the given <Rect> into this rectangle.
Copies the values of the given <Rect > into this rectangle .