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This CL converts PaymentHandlerHost{Ptr, PtrInfo} in blink and
components to the new Mojo types.

Bug: 955171, 978694
Change-Id: I903ce85df7ca3d221fcff3c64c366ba1e107d2ac
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1782199Reviewed-by: Matt Falkenhagen <falken@chromium.org>
Reviewed-by: Rouslan Solomakhin <rouslan@chromium.org>
Reviewed-by: Oksana Zhuravlova <oksamyt@chromium.org>
Commit-Queue: Miyoung Shin <myid.shin@igalia.com>
Cr-Commit-Position: refs/heads/master@{#692927}