GitLab

This adds a use counter for calls to
PublicKeyCredential.isUserVerifyingPlatformAuthenticatorAvailable(). The
counter's name is prefixed with `kCredentialManager` for consistency
with other WebAuthn related metrics.

Fixed: 1018318
Change-Id: I2ba0e96a37405b7774259c09eb34c534ee43f640
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1880319
Commit-Queue: Martin Kreichgauer <martinkr@google.com>
Auto-Submit: Martin Kreichgauer <martinkr@google.com>
Reviewed-by: Adam Langley <agl@chromium.org>
Cr-Commit-Position: refs/heads/master@{#710056}