Update comment in `SafeUrl.fromDataUrl` to explain the risks associated with unrestricted content types in data urls. RELNOTES: n/a
Update comment in `SafeUrl.fromDataUrl` to explain the risks associated with unrestricted content types in data urls.
RELNOTES: n/a

PiperOrigin-RevId: 304490556

google/closure-library,google/closure-library,google/closure-library,google/closure-library,google/closure-library