[ios] Extend histograms

Fiexd: 327213449, 327213123
Change-Id: I41aa57e1de363e5faf6d1ede449db29404cbb146
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5329653


Auto-Submit: Chris Lu <thegreenfrog@chromium.org>
Commit-Queue: Chris Lu <thegreenfrog@chromium.org>
Reviewed-by: Alexei Svitkine <asvitkine@chromium.org>
Reviewed-by: Sergio Collazos <sczs@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1269934}