Remove legacy StartsWithASCII function.

components/content_settings/core/common/content_settings_pattern_parser.cc

Index: components/content_settings/core/common/content_settings_pattern_parser.cc
diff --git a/components/content_settings/core/common/content_settings_pattern_parser.cc b/components/content_settings/core/common/content_settings_pattern_parser.cc
index cbdd260ead66c01bec9f345f7c8fb155040ac2ef..7a5ca79f0cc317e2415fe153720823173dde4d05 100644
--- a/components/content_settings/core/common/content_settings_pattern_parser.cc
+++ b/components/content_settings/core/common/content_settings_pattern_parser.cc
@@ -130,7 +130,8 @@ void PatternParser::Parse(const std::string& pattern_spec,
                                            host_component.len);
     if (host == kHostWildcard) {
       builder->WithDomainWildcard();
-    } else if (base::StartsWithASCII(host, kDomainWildcard, true)) {
+    } else if (base::StartsWith(host, kDomainWildcard,
+                                base::CompareCase::SENSITIVE)) {
       host = host.substr(kDomainWildcardLength);
       builder->WithDomainWildcard();
       builder->WithHost(host);