Use sizeof(x) instead of arraysize(x) * sizeof(x[0])
Use sizeof(x) instead of arraysize(x) * sizeof(x[0])

/analyze warned that:
url_formatter.cc(543) : warning C6260: sizeof * sizeof is usually wrong

The code it was complaining about is in fact not wrong, but it is
confusing. The code uses the expression
    arraysize(kIdnPrefix) * sizeof(base::char16)
when it would be simpler to use
    sizeof(kIdnPrefix)

In addition to being simpler and clearer the sizeof expression doesn't
require knowing the type of kIdnPrefix in order to evaluate its
correctness.

R=pkasting@chromium.org
BUG=427616

Review URL: https://codereview.chromium.org/1286503002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#342685}

ltilve/ChromiumGStreamerBackend,CapOM/ChromiumGStreamerBackend,CapOM/ChromiumGStreamerBackend,ltilve/ChromiumGStreamerBackend,CapOM/ChromiumGStreamerBackend,CapOM/ChromiumGStreamerBackend,CapOM/ChromiumGStreamerBackend,ltilve/ChromiumGStreamerBackend,CapOM/ChromiumGStreamerBackend,CapOM/ChromiumGStreamerBackend,ltilve/ChromiumGStreamerBackend,ltilve/ChromiumGStreamerBackend,ltilve/ChromiumGStreamerBackend,CapOM/ChromiumGStreamerBackend,CapOM/ChromiumGStreamerBackend,ltilve/ChromiumGStreamerBackend,ltilve/ChromiumGStreamerBackend,ltilve/ChromiumGStreamerBackend