ABANDONED: chromeos: Remove spammy "Failed to get machine id" warning.

chrome/browser/chromeos/policy/device_cloud_policy_manager_chromeos.h

Index: chrome/browser/chromeos/policy/device_cloud_policy_manager_chromeos.h
diff --git a/chrome/browser/chromeos/policy/device_cloud_policy_manager_chromeos.h b/chrome/browser/chromeos/policy/device_cloud_policy_manager_chromeos.h
index 9cdabac5407eb4c588453c450a186d673e76f7b5..fd53ce7700b790f3ac723fac8d77e3aa9d35fa41 100644
--- a/chrome/browser/chromeos/policy/device_cloud_policy_manager_chromeos.h
+++ b/chrome/browser/chromeos/policy/device_cloud_policy_manager_chromeos.h
@@ -85,7 +85,9 @@ class DeviceCloudPolicyManagerChromeOS : public CloudPolicyManager {
   // Pref registration helper.
   static void RegisterPrefs(PrefRegistrySimple* registry);
 
-  // Returns the device serial number, or an empty string if not available.
+  // Returns the device serial number, or an empty string if unavailable
+  // (possibly due to the device having already been enrolled or claimed by a
+  // local user).
   static std::string GetMachineID();
 
   // Returns the machine model, or an empty string if not available.