Remove stl_util's deletion function use from components/url_matcher/.

components/url_matcher/regex_set_matcher.h

Index: components/url_matcher/regex_set_matcher.h
diff --git a/components/url_matcher/regex_set_matcher.h b/components/url_matcher/regex_set_matcher.h
index 0f9e52b26f5dcff8304b9e0975e7e1406b313fe7..4be90dce1915a4b379182104ccfba55e7c467de3 100644
--- a/components/url_matcher/regex_set_matcher.h
+++ b/components/url_matcher/regex_set_matcher.h
@@ -75,7 +75,7 @@ class URL_MATCHER_EXPORT RegexSetMatcher {
 
   // The substring patterns from FilteredRE2, which are used in
   // |substring_matcher_| but whose lifetime is managed here.
-  std::vector<const StringPattern*> substring_patterns_;
+  std::vector<std::unique_ptr<StringPattern>> substring_patterns_;
 };
 
 }  // namespace url_matcher