MojoHandle was recently changed from 32 bits to 64 bits wide in order
to have parity with ipcz handles. ipcz handles however have since been
standardized as pointer-sized rather than fixed at 64 bits.
This updates MojoHandle to be an alias for uintptr_t, in order to
maintain parity with current ipcz, once again breaking the Mojo
ABI. This is fine since the Mojo ABI only has one known project
depending on its stability (Chrome OS IME) and it's already using
an alternative (strictly 32-bit) ABI.
Bug: 1299283
Change-Id: Ibe97e8882b4f1b9f08e780c3acc48bec60f2ef60
Fixed: 1322162
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3804110
Commit-Queue: Ken Rockot <rockot@google.com>
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1031404}
d61f19cc6a