[iOS][Default Promo][Metrics] Add action histogram for quick analysis
Adds 3 histograms:
IOS.DefaultBrowserFullscreenTailoredPromoAllTabs
IOS.DefaultBrowserFullscreenTailoredPromoMadeForIOS
IOS.DefaultBrowserFullscreenTailoredPromoStaySafe
To easily compare CTR on each tailored promo
Bug: 1205221
Change-Id: Iec93e12c9d64f16f597b9c752f9bad43ec72041c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2873115
Commit-Queue: Javier Flores <javierrobles@chromium.org>
Reviewed-by: Ali Juma <ajuma@chromium.org>
Cr-Commit-Position: refs/heads/master@{#879418}
NOKEYCHECK=True
GitOrigin-RevId: 594a19b27b592d47bb673323ff7173c75cc4d038
1 file changed