Send a message to the client if bad It2Me policies are read.

remoting/host/policy_watcher.h

Index: remoting/host/policy_watcher.h
diff --git a/remoting/host/policy_watcher.h b/remoting/host/policy_watcher.h
index 49d0dd583abf9f2aaa084bff6e0b348307a2e9b3..37195c576d2c823944e441aab3530c40fe364d2a 100644
--- a/remoting/host/policy_watcher.h
+++ b/remoting/host/policy_watcher.h
@@ -59,7 +59,8 @@ class PolicyWatcher : public policy::PolicyService::Observer,
       const PolicyUpdatedCallback& policy_updated_callback,
       const PolicyErrorCallback& policy_error_callback);
 
-  // Return the current policies.
+  // Return the current policies. If the policies have not yet been read, or if
+  // an error occurred, the returned dictionary will be empty.
   std::unique_ptr<base::DictionaryValue> GetCurrentPolicies();
 
   // Return the default policies.