Merge tools/grit from https://chromium.googlesource.com/external/grit-i18n.git at 9d0994ec3e3f439ef3b34e07b65dc594611dba3e

This commit was generated by merge_from_chromium.py.

Change-Id: I0a619cc9b7d3b3a871ac47e18ad404f5fccc47cc