Change mmaped file on POSIX to use checked_cast.

error: comparison 'int64_t' (aka 'long') > 9223372036854775807 is always false

BUG=None

Change-Id: Idffa1a937f1686bab7b6f2bb685ad1c782c42ada
Reviewed-on: https://chromium-review.googlesource.com/737455
Reviewed-by: Mark Mentovai <mark@chromium.org>
Commit-Queue: Will Harris <wfh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#511983}

CrOS-Libchrome-Original-Commit: 72ce4cd7e247c326e9c79b6f7903a25ce762d9f1
1 file changed
tree: abf321bd55cd4995a46ef3aa3ae8ae7227b3b2de
  1. base/
  2. build/
  3. components/
  4. dbus/
  5. device/
  6. ipc/
  7. mojo/
  8. testing/
  9. third_party/
  10. ui/