Clean content_settings_pattern_parser.* from unnecessary dependencies.

chrome/browser/policy/policy_browsertest.cc

Index: chrome/browser/policy/policy_browsertest.cc
diff --git a/chrome/browser/policy/policy_browsertest.cc b/chrome/browser/policy/policy_browsertest.cc
index bc4bc930ab5133bc9c2839738c26540fa5a3e2e8..65ab513b82d1aa62278a3d05320ca6600024a82a 100644
--- a/chrome/browser/policy/policy_browsertest.cc
+++ b/chrome/browser/policy/policy_browsertest.cc
@@ -2928,7 +2928,8 @@ class MediaStreamDevicesControllerBrowserTest
         list->AppendString(allow_rule);
         request_url_allowed_via_whitelist_ = true;
       } else {
-        list->AppendString(ContentSettingsPattern::Wildcard().ToString());
+        list->AppendString(ContentSettingsPattern::Wildcard().ToString(
+            extensions::kExtensionScheme));
         // We should ignore all wildcard entries in the whitelist, so even
         // though we've added an entry, it should be ignored and our expectation
         // is that the request has not been allowed via the whitelist.