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Resource extraction and file expansion in the mini_installer now use
the MiniFile class to manage output files while they are open. It takes
care of handle lifetime management and provides a robust way to delete
an open file.

This change also fixes two potential file leaks. Specifically, a
destination file created by either PEResource::WriteToDisk or
mini_installer::Expand is now deleted in case of error.

BUG=516207

Change-Id: I2ee894d4e6f2d04fbb6cf3355638ee50e8bb1bf9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2303400Reviewed-by: Will Harris <wfh@chromium.org>
Commit-Queue: Greg Thompson <grt@chromium.org>
Cr-Commit-Position: refs/heads/master@{#790547}