DriveFileSyncService listens to OnNetworkConnected event to restart synchronization

chrome/browser/sync_file_system/drive_file_sync_service.cc

 // Copyright (c) 2012 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/sync_file_system/drive_file_sync_service.h"
 
 #include <algorithm>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 522 matching lines @@
   DVLOG(1) << "OnAuthenticated";
   if (state_ == REMOTE_SERVICE_AUTHENTICATION_REQUIRED ||
       state_ == REMOTE_SERVICE_TEMPORARY_UNAVAILABLE) {
     state_ = REMOTE_SERVICE_OK;
     FOR_EACH_OBSERVER(
         Observer, observers_,
         OnRemoteServiceStateUpdated(state_, "Authenticated"));
   }
 }
 
+void DriveFileSyncService::OnNetworkConnected() {
+  DVLOG(1) << "OnNetworkConnected";
+  if (state_ == REMOTE_SERVICE_AUTHENTICATION_REQUIRED ||
+      state_ == REMOTE_SERVICE_TEMPORARY_UNAVAILABLE) {
+    state_ = REMOTE_SERVICE_OK;
+    FOR_EACH_OBSERVER(
+        Observer, observers_,
+        OnRemoteServiceStateUpdated(state_, "Network connected"));
+  }
+}
+
 // Called by CreateForTesting.
 DriveFileSyncService::DriveFileSyncService(
     const FilePath& base_dir,
     scoped_ptr<DriveFileSyncClient> sync_client,
     scoped_ptr<DriveMetadataStore> metadata_store)
     : last_operation_status_(fileapi::SYNC_STATUS_OK),
       state_(REMOTE_SERVICE_OK),
       largest_fetched_changestamp_(0),
       polling_enabled_(false),
       weak_factory_(ALLOW_THIS_IN_INITIALIZER_LIST(this)) {
@@ skipping 954 matching lines @@
 fileapi::SyncStatusCode
 DriveFileSyncService::GDataErrorCodeToSyncStatusCodeWrapper(
     google_apis::GDataErrorCode error) const {
   fileapi::SyncStatusCode status = GDataErrorCodeToSyncStatusCode(error);
   if (status != fileapi::SYNC_STATUS_OK && !sync_client_->IsAuthenticated())
     return fileapi::SYNC_STATUS_AUTHENTICATION_FAILED;
   return status;
 }
 
 }  // namespace sync_file_system