[fsp] Introduce file_system_provider::Service class for the FileSystemProvider API.

chrome/browser/chromeos/file_manager/volume_manager_factory.cc

Index: chrome/browser/chromeos/file_manager/volume_manager_factory.cc
diff --git a/chrome/browser/chromeos/file_manager/volume_manager_factory.cc b/chrome/browser/chromeos/file_manager/volume_manager_factory.cc
index 600084806e4610807dad98952134bf0a3a1cc82c..6428f0fe4f298622dc08a1323b417f5f10d38059 100644
--- a/chrome/browser/chromeos/file_manager/volume_manager_factory.cc
+++ b/chrome/browser/chromeos/file_manager/volume_manager_factory.cc
@@ -8,6 +8,7 @@
 #include "base/memory/singleton.h"
 #include "chrome/browser/chromeos/drive/drive_integration_service.h"
 #include "chrome/browser/chromeos/file_manager/volume_manager.h"
+#include "chrome/browser/chromeos/file_system_provider/service_factory.h"
 #include "chrome/browser/profiles/incognito_helpers.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chromeos/dbus/dbus_thread_manager.h"
@@ -43,10 +44,12 @@ KeyedService* VolumeManagerFactory::BuildServiceInstanceFor(
     content::BrowserContext* profile) const {
   VolumeManager* instance = new VolumeManager(
       Profile::FromBrowserContext(profile),
-      drive::DriveIntegrationServiceFactory::
-          GetForProfileRegardlessOfStates(Profile::FromBrowserContext(profile)),
+      drive::DriveIntegrationServiceFactory::GetForProfileRegardlessOfStates(
+          Profile::FromBrowserContext(profile)),
       chromeos::DBusThreadManager::Get()->GetPowerManagerClient(),
-      chromeos::disks::DiskMountManager::GetInstance());
+      chromeos::disks::DiskMountManager::GetInstance(),
+      chromeos::file_system_provider::ServiceFactory::Get(
+          Profile::FromBrowserContext(profile)));
   instance->Initialize();
   return instance;
 }
@@ -56,6 +59,7 @@ VolumeManagerFactory::VolumeManagerFactory()
           "VolumeManagerFactory",
           BrowserContextDependencyManager::GetInstance()) {
   DependsOn(drive::DriveIntegrationServiceFactory::GetInstance());
+  DependsOn(chromeos::file_system_provider::ServiceFactory::GetInstance());
 }
 
 VolumeManagerFactory::~VolumeManagerFactory() {