Merge tools/grit from https://chromium.googlesource.com/external/grit-i18n.git at e297aa63727b070e6095c669fcb79cc5a996ced7

This commit was generated by merge_from_chromium.py.

Change-Id: Id5bf6af9c2e393328dec4b57b62b6f3b8210f7d7