GitLab

Clear the |*base|-address out-parameter to null in case of blocking, to
ensure that calling-code won't get confused by seeing a failure NTSTATUS
with a non-null base-address.  e.g. Win32's MapViewOfFile() returns the
base-pointer as its result, using null to indicate failure, and leaves
the Win32 GetLastError() set based on the NTSTATUS.

Bug: 864351, 870663
Change-Id: I0aa2aacd1075224100d10d6291a416849f6d227b
Reviewed-on: https://chromium-review.googlesource.com/1211322Reviewed-by: Robert Shield <robertshield@chromium.org>
Reviewed-by: Bruce Dawson <brucedawson@chromium.org>
Commit-Queue: Wez <wez@chromium.org>
Cr-Commit-Position: refs/heads/master@{#589353}