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This CL moves chromeOS strings for internet pages from
settings_strings.grdp to os_settings_strings.grdp. It continues
the process of moving all chromeOS specific strings.

Bug: 967883
Change-Id: Ifadbe4ec79e2158d7730456653f1e226bb0a991f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2067540
Commit-Queue: Nnamdi Theodore Johnson-kanu <tjohnsonkanu@google.com>
Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Cr-Commit-Position: refs/heads/master@{#743708}