Fix header guards in ios/.

Generated mechanically as follows:

git ls-files '*.h' | grep '^ios/' | \
    xargs parallel cpplint.py --filter=-,+build/header_guard -- 2>&1 | \
    grep build/header_guard | tools/apply_cpplint_header_guard.py

Bug: 1200694
Change-Id: I527e1d601613bee8cab8543ca75bbf47d1dc35b4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2838546
Reviewed-by: Sylvain Defresne <sdefresne@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#874769}
GitOrigin-RevId: 392d5bf34ce94c879ceba94d7aec79fe42239dc7
44 files changed