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We occasionally fail Trust Tokens operations due to transient
unavailability of the entire Trust Tokens logic, for instance when third
party cookies are being blocked unconditionally due a user setting. This
logic (in url_loader_factory.cc, providing the `authorizer` callback
argument to TrustTokenRequestHelperFactory) means that Trust Tokens
operations will sometimes fail "during normal operation," at no fault of
the caller's.

We'd like to avoid printing console errors in this case. For instance,
right now because third party cookies are disabled by default in
incognito mode, we print a console error on every Trust Tokens operation
executed in incognito mode.

This CL extends the Trust Tokens-related console message suppression in
FrameConsole to encompass "unactionable" Trust Tokens failures, like
ones due to TrustTokenOperationStatus::kUnavailable, which represents an
unavoidable unavailability of the Trust Tokens subsystem.

Test: Adds an inspector-protocol WPT ensuring no errors are logged
Bug: 1111572
Change-Id: I53898a272fb8063cdbddfda0e916e49525973d09
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2385878Reviewed-by: Yutaka Hirano <yhirano@chromium.org>
Commit-Queue: David Van Cleve <davidvc@chromium.org>
Cr-Commit-Position: refs/heads/master@{#804251}