I claim the ornamental design for an electronic chassis for use in a portable carrying case.
FIG. 1 is a top, front and left side perspective view of an electronic chassis sized to fit in a portable carrying case or similar article showing my new design; and,
FIG. 2 is an exploded top, front, and left side perspective view thereof.
The broken line illustration of the portable carrying case in the drawings depicts the environment in which the design resides and forms no part of the claim.