Tweaks to POST request to device management server

chrome/browser/policy/device_management_policy_provider.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_management_policy_provider.h"
 
 #include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/path_service.h"
 #include "base/rand_util.h"
@@ skipping 164 matching lines @@
 }
 
 void DeviceManagementPolicyProvider::SendPolicyRequest() {
   if (!policy_request_pending_) {
     policy_request_pending_ = true;
     em::DevicePolicyRequest policy_request;
     policy_request.set_policy_scope(kChromePolicyScope);
     em::DevicePolicySettingRequest* setting =
         policy_request.add_setting_request();
     setting->set_key(kChromeDevicePolicySettingKey);
+    setting->set_watermark("");
     backend_->ProcessPolicyRequest(token_fetcher_->GetDeviceToken(),
                                    token_fetcher_->GetDeviceID(),
                                    policy_request, this);
   }
 }
 
 void DeviceManagementPolicyProvider::RefreshTaskExecute() {
   DCHECK(refresh_task_pending_);
   refresh_task_pending_ = false;
   // If there is no valid device token, the token_fetcher_ apparently failed,
@@ skipping 42 matching lines @@
   const FilePath device_management_dir = user_data_dir.Append(
       FILE_PATH_LITERAL("Device Management"));
   if (!file_util::DirectoryExists(device_management_dir)) {
     if (!file_util::CreateDirectory(device_management_dir))
       NOTREACHED();
   }
   return device_management_dir;
 }
 
 }  // namespace policy