Remove NaCl dependency on extensions::InfoMap

This is one of the last major chunks still depending on
extensions::InfoMap. NaCl was the only caller of MapUrlToLocalFilePath.
MapUrlToLocalFilePath has been replaced in NaClBrowserDelegate with
GetMapUrlToLocalFilePathCallback, which will return a callback that
can be used on any thread which matches the behavior or
MapUrlToLocalFilePath.

Change-Id: If8577b6d639651375975589f439af6e84909a24c
Bug: 990868
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1733798
Reviewed-by: Karan Bhatia <[email protected]>
Reviewed-by: Derek Schuff <[email protected]>
Commit-Queue: Clark DuVall <[email protected]>
Cr-Commit-Position: refs/heads/master@{#684845}
19 files changed