Support PolicyWatcher with custom loader for testing

remoting/host/policy_watcher_unittest.cc

Index: remoting/host/policy_watcher_unittest.cc
diff --git a/remoting/host/policy_watcher_unittest.cc b/remoting/host/policy_watcher_unittest.cc
index 7df7c7d772b94dbc1f2c5a54abdd9eef91db4439..ccbdf6d8f46dc993d2bcc1188270a4120a3ebea2 100644
--- a/remoting/host/policy_watcher_unittest.cc
+++ b/remoting/host/policy_watcher_unittest.cc
@@ -71,8 +71,8 @@ class PolicyWatcherTest : public testing::Test {
     // Retaining a raw pointer to keep control over policy contents.
     policy_loader_ =
         new policy::FakeAsyncPolicyLoader(base::ThreadTaskRunnerHandle::Get());
-    policy_watcher_ =
-        PolicyWatcher::CreateFromPolicyLoader(base::WrapUnique(policy_loader_));
+    policy_watcher_ = PolicyWatcher::CreateFromPolicyLoaderForTesting(
+        base::WrapUnique(policy_loader_));
 
     nat_true_.SetBoolean(key::kRemoteAccessHostFirewallTraversal, true);
     nat_false_.SetBoolean(key::kRemoteAccessHostFirewallTraversal, false);