Allow policy refresh rate to be configured through policy.

chrome/browser/policy/device_token_fetcher.cc

 // Copyright (c) 2011 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 "base/string_util.h"
@@ skipping 47 matching lines @@
 namespace em = enterprise_management;
 
 DeviceTokenFetcher::ObserverRegistrar::ObserverRegistrar() {}
 
 DeviceTokenFetcher::ObserverRegistrar::~ObserverRegistrar() {
   RemoveAll();
 }
 
 void DeviceTokenFetcher::ObserverRegistrar::Init(
     DeviceTokenFetcher* token_fetcher) {
+  RemoveAll();
   token_fetcher_ = token_fetcher;
 }
 
 void DeviceTokenFetcher::ObserverRegistrar::AddObserver(
     DeviceTokenFetcher::Observer* observer) {
   observers_.push_back(observer);
   token_fetcher_->AddObserver(observer);
 }
 
 void DeviceTokenFetcher::ObserverRegistrar::RemoveAll() {
@@ skipping 107 matching lines @@
         // The Windows compiler needs explicit template instantiation.
         NewRunnableFunction<bool(*)(const FilePath&, bool), FilePath, bool>(
             &file_util::Delete, token_path_, false));
     SetState(kStateNotManaged);
     return;
   }
   SetState(kStateFailure);
 }
 
 void DeviceTokenFetcher::Restart() {
-  DCHECK(!IsTokenPending());
+  // Complain if there's currently an asynchronous operation going on.
+  DCHECK(state_ == kStateNotStarted ||
+         state_ == kStateHasDeviceToken ||
+         state_ == kStateFailure ||
+         state_ == kStateNotManaged);
   device_token_.clear();
   device_token_load_complete_event_.Reset();
   MakeReadyToRequestDeviceToken();
 }
 
 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
@@ skipping 120 matching lines @@
   DCHECK(no_error);
   file_util::WriteFile(path, data.c_str(), data.length());
 }
 
 // static
 std::string DeviceTokenFetcher::GenerateNewDeviceID() {
   return guid::GenerateGUID();
 }
 
 }  // namespace policy