[Sync] Fix namespaces for the browser_sync component.

chrome/browser/extensions/api/signed_in_devices/signed_in_devices_manager.cc

 // Copyright 2013 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/extensions/api/signed_in_devices/signed_in_devices_manager.h"
 
 #include <memory>
 #include <string>
 #include <utility>
 #include <vector>
@@ skipping 25 matching lines @@
   api_device_info->type = api::signed_in_devices::ParseDeviceType(
       device_info.GetDeviceTypeString());
   api_device_info->chrome_version = device_info.chrome_version();
 }
 }  // namespace
 
 SignedInDevicesChangeObserver::SignedInDevicesChangeObserver(
     const std::string& extension_id,
     Profile* profile) : extension_id_(extension_id),
                         profile_(profile) {
-  ProfileSyncService* pss = ProfileSyncServiceFactory::GetForProfile(profile_);
+  browser_sync::ProfileSyncService* pss =
+      ProfileSyncServiceFactory::GetForProfile(profile_);
   if (pss) {
     DCHECK(pss->GetDeviceInfoTracker());
     pss->GetDeviceInfoTracker()->AddObserver(this);
   }
 }
 
 SignedInDevicesChangeObserver::~SignedInDevicesChangeObserver() {
-  ProfileSyncService* pss = ProfileSyncServiceFactory::GetForProfile(profile_);
+  browser_sync::ProfileSyncService* pss =
+      ProfileSyncServiceFactory::GetForProfile(profile_);
   if (pss) {
     DCHECK(pss->GetDeviceInfoTracker());
     pss->GetDeviceInfoTracker()->RemoveObserver(this);
   }
 }
 
 void SignedInDevicesChangeObserver::OnDeviceInfoChange() {
   // There is a change in the list of devices. Get all devices and send them to
   // the listener.
   std::vector<std::unique_ptr<DeviceInfo>> devices =
@@ skipping 87 matching lines @@
 }
 
 void SignedInDevicesManager::OnExtensionUnloaded(
     content::BrowserContext* browser_context,
     const Extension* extension,
     UnloadedExtensionInfo::Reason reason) {
   RemoveChangeObserverForExtension(extension->id());
 }
 
 }  // namespace extensions