No persisted device id/token for unmanaged devices

chrome/browser/policy/device_token_fetcher.cc

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/policy/device_token_fetcher.h"
 
 #include "base/file_util.h"
 #include "base/path_service.h"
 #include "base/singleton.h"
 #include "chrome/browser/guid.h"
@@ skipping 60 matching lines @@
                             device_id_));
     SetState(kStateHasDeviceToken);
   } else {
     NOTREACHED();
     SetState(kStateFailure);
   }
 }
 
 void DeviceTokenFetcher::OnError(DeviceManagementBackend::ErrorCode code) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  // For privacy reasons, delete all identifying data when this device is not
+  // managed.
+  if (code == DeviceManagementBackend::kErrorServiceManagementNotSupported) {
+    device_token_ = std::string();
+    device_id_ = std::string();
+    file_util::Delete(token_path_, false);
+  }
   SetState(kStateFailure);
 }
 
 void DeviceTokenFetcher::StartFetching() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   if (state_ == kStateNotStarted) {
     SetState(kStateLoadDeviceTokenFromDisk);
     // The file calls for loading the persisted token must be deferred to the
     // FILE thread.
     BrowserThread::PostTask(
@@ skipping 108 matching lines @@
   std::string data;
   DCHECK(device_credentials.SerializeToString(&data));
   file_util::WriteFile(path, data.c_str(), data.length());
 }
 
 // static
 std::string DeviceTokenFetcher::GenerateNewDeviceID() {
   return guid::GenerateGUID();
 }
 
-}
+}  // namespace policy