ReverseRows = function (matrix)
{
    for (var i = 0; i < matrix.length; i++)
    {
        matrix[i].reverse();
    }

    return matrix;
}
Reverses the rows in the given Array Matrix.

A matrix is a two-dimensional array (array of arrays), where all sub-arrays (rows)
have the same length. There must be at least two rows. This is an example matrix:

```
[
   [ 1, 1, 1, 1, 1, 1 ],
   [ 2, 0, 0, 0, 0, 4 ],
   [ 2, 0, 1, 2, 0, 4 ],
   [ 2, 0, 3, 4, 0, 4 ],
   [ 2, 0, 0, 0, 0, 4 ],
   [ 3, 3, 3, 3, 3, 3 ]
]
```

@function Phaser.Utils.Array.Matrix.ReverseRows
@since 3.0.0

@generic T
@genericUse {T[][]} - [matrix,$return]

@param {T[][]} [matrix] - The array matrix to reverse the rows for.

@return {T[][]} The column reversed matrix.