This attempts to be somewhat forward-compatible with upcoming additions
to the Data struct, most importantly to not lose the client ID if we
ever need to downgrade / read data from a future crashpad version.
Bug: 42310127
Change-Id: Ic3914fdd8460f4f41e5bb523d5c52361767880dd
Reviewed-on: https://chromium-review.googlesource.com/c/crashpad/crashpad/+/5915193
Reviewed-by: Mark Mentovai <mark@chromium.org>
Reviewed-by: Jesse McKenna <jessemckenna@google.com>
Commit-Queue: Peter Boström <pbos@chromium.org>