Hold the raw HtmlSanitizerUrlPolicies on the HtmlSanitizer instance, wrapping them as HtmlSanitizerPolicy only when installing policies.
Hold the raw HtmlSanitizerUrlPolicies on the HtmlSanitizer instance, wrapping them as HtmlSanitizerPolicy only when installing policies.

RELNOTES: n/a

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=168886644

teppeis/closure-library,google/closure-library,google/closure-library,lucidsoftware/closure-library,platinumpixs/google-closure-library,teppeis/closure-library,teppeis/closure-library,platinumpixs/google-closure-library,google/closure-library,lucidsoftware/closure-library,platinumpixs/google-closure-library,lucidsoftware/closure-library,lucidsoftware/closure-library,google/closure-library,google/closure-library,platinumpixs/google-closure-library,teppeis/closure-library