The Java URIUtils class:

https://cs.chromium.org/chromium/src/chrome/android/java/src/org/chromium/chrome/browser/payments/UriUtils.java?q=uriutils.java&dr

is needlessly bespoke. We make a lot of similar decisions in, e.g., payment_manifest_parser:

https://cs.chromium.org/chromium/src/components/payments/content/utility/payment_manifest_parser.cc

using GURLs and friends, and could extract much of this into a friendly util.