[components] Switch {RefCounted}ProfileKeyedService to use BrowserContext

chrome/browser/policy/cloud/user_policy_signin_service_unittest.cc

Index: chrome/browser/policy/cloud/user_policy_signin_service_unittest.cc
diff --git a/chrome/browser/policy/cloud/user_policy_signin_service_unittest.cc b/chrome/browser/policy/cloud/user_policy_signin_service_unittest.cc
index 9dc136d4e2fc60f4eb00be40c7b3ea3376a78b87..397753a683098603b40955ab6a04e51d123c0007 100644
--- a/chrome/browser/policy/cloud/user_policy_signin_service_unittest.cc
+++ b/chrome/browser/policy/cloud/user_policy_signin_service_unittest.cc
@@ -73,8 +73,8 @@ class SigninManagerFake : public FakeSigninManager {
     SignOut();
   }
 
-  static ProfileKeyedService* Build(Profile* profile) {
-    return new SigninManagerFake(profile);
+  static ProfileKeyedService* Build(content::BrowserContext* profile) {
+    return new SigninManagerFake(static_cast<Profile*>(profile));
   }
 };
 }  // namespace