Replace base::hash_map with std::unordered_map

base::hash_map is alias of std::unordered_map now.

I forgot to replace this in
https://chromium-review.googlesource.com/c/chromium/src/+/1390892

This is generated by following command:

$ git grep -l 'base::hash_map' | fgrep -v 'base/containers/' | \
    xargs sed -i -e 's/base::hash_map/std::unordered_map/g' \
          -e 's/\(#include <[a-z_]*>\)/\1\n#include <unordered_map>/' \
          -e 's/BASE_HASH_NAMESPACE/std/'
$ git cl format

Bug: 576864
TBR: thakis@chromium.org
Change-Id: I2f2cba9f45526e79545b65760227caed62ceef5e
Reviewed-on: https://chromium-review.googlesource.com/c/1396003
Commit-Queue: Takuto Ikuta <tikuta@chromium.org>
Reviewed-by: Nico Weber <thakis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#620341}
4 files changed