[Blink] Split out logic for whether we can create CRPPassThrough

This CL turns CreatePassThroughProvider() into
CanCreatePassThroughProvider() and moves the code for actually creating
the CRPPassThrough to the callsite. This will facilitate eliminating
CRPPassThrough while preserving semantics in followup work.

Bug: 352263194
Change-Id: Id4ae23e392a4bf87c88fdef83874964616d0e488
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6662879
Reviewed-by: Vasiliy Telezhnikov <vasilyt@chromium.org>
Commit-Queue: Colin Blundell <blundell@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1477784}