changes to wasm debugger for UI integration

Bug: skia:
Change-Id: I8f00cbb6682c1fdf6c1bb5eb118a00f38b7005f1
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/203730
Commit-Queue: Nathaniel Nifong <nifong@google.com>
Reviewed-by: Kevin Lubick <kjlubick@google.com>
6 files changed