DriveFileSyncService listens to OnNetworkConnected event to restart synchronization

chrome/browser/sync_file_system/drive_file_sync_client.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_client.h"
 
 #include <sstream>
 
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
@@ skipping 51 matching lines @@
 }
 
 }  // namespace
 
 DriveFileSyncClient::DriveFileSyncClient(Profile* profile) {
   drive_service_.reset(new google_apis::GDataWapiService(
       GURL(google_apis::GDataWapiUrlGenerator::kBaseUrlForProduction),
       "" /* custom_user_agent */));
   drive_service_->Initialize(profile);
   drive_service_->AddObserver(this);
+  net::NetworkChangeNotifier::AddConnectionTypeObserver(this);
 
   drive_uploader_.reset(new google_apis::DriveUploader(drive_service_.get()));
 }
 
 scoped_ptr<DriveFileSyncClient> DriveFileSyncClient::CreateForTesting(
     Profile* profile,
     scoped_ptr<google_apis::DriveServiceInterface> drive_service,
     scoped_ptr<google_apis::DriveUploaderInterface> drive_uploader) {
   return make_scoped_ptr(new DriveFileSyncClient(
       profile, drive_service.Pass(), drive_uploader.Pass()));
 }
 
 DriveFileSyncClient::DriveFileSyncClient(
     Profile* profile,
     scoped_ptr<google_apis::DriveServiceInterface> drive_service,
     scoped_ptr<google_apis::DriveUploaderInterface> drive_uploader) {
   drive_service_ = drive_service.Pass();
   drive_service_->Initialize(profile);
   drive_service_->AddObserver(this);
+  net::NetworkChangeNotifier::AddConnectionTypeObserver(this);
 
   drive_uploader_ = drive_uploader.Pass();
 }
 
 DriveFileSyncClient::~DriveFileSyncClient() {
   DCHECK(CalledOnValidThread());
+  net::NetworkChangeNotifier::RemoveConnectionTypeObserver(this);
   drive_service_->RemoveObserver(this);
   drive_service_->CancelAll();
 }
 
 void DriveFileSyncClient::AddObserver(DriveFileSyncClientObserver* observer) {
   DCHECK(CalledOnValidThread());
   observers_.AddObserver(observer);
 }
 
 void DriveFileSyncClient::RemoveObserver(
@@ skipping 261 matching lines @@
                  AsWeakPtr(),
                  base::Bind(&DriveFileSyncClient::DeleteFileInternal,
                             AsWeakPtr(), remote_file_md5, callback)));
 }
 
 void DriveFileSyncClient::OnReadyToPerformOperations() {
   DCHECK(CalledOnValidThread());
   FOR_EACH_OBSERVER(DriveFileSyncClientObserver, observers_, OnAuthenticated());
 }
 
+void DriveFileSyncClient::OnConnectionTypeChanged(
+    net::NetworkChangeNotifier::ConnectionType type) {
+  DCHECK(CalledOnValidThread());
+  if (type != net::NetworkChangeNotifier::CONNECTION_NONE)
+    FOR_EACH_OBSERVER(DriveFileSyncClientObserver,
+                      observers_, OnNetworkConnected());
+}
+
 void DriveFileSyncClient::DidGetDocumentFeedData(
     const DocumentFeedCallback& callback,
     google_apis::GDataErrorCode error,
     scoped_ptr<base::Value> data) {
   DCHECK(CalledOnValidThread());
 
   if (error != google_apis::HTTP_SUCCESS) {
     callback.Run(error, scoped_ptr<google_apis::DocumentFeed>());
     return;
   }
@@ skipping 229 matching lines @@
 }
 
 void DriveFileSyncClient::DidDeleteFile(
     const GDataErrorCallback& callback,
     google_apis::GDataErrorCode error) {
   DCHECK(CalledOnValidThread());
   callback.Run(error);
 }
 
 }  // namespace sync_file_system