Canvas = function (texture, sourceIndex)
{
    var source = texture.source[sourceIndex];

    texture.add('__BASE', sourceIndex, 0, 0, source.width, source.height);

    return texture;
}
Adds a Canvas Element to a Texture.

@function Phaser.Textures.Parsers.Canvas
@memberof Phaser.Textures.Parsers
@private
@since 3.0.0

@param {Phaser.Textures.Texture} texture - The Texture to add the Frames to.
@param {number} sourceIndex - The index of the TextureSource.

@return {Phaser.Textures.Texture} The Texture modified by this parser.