Introduce profile for lock screen apps

chrome/browser/chromeos/file_manager/volume_manager.cc

Index: chrome/browser/chromeos/file_manager/volume_manager.cc
diff --git a/chrome/browser/chromeos/file_manager/volume_manager.cc b/chrome/browser/chromeos/file_manager/volume_manager.cc
index 191e334797d915265ae1ff14f40d7f71dcfbe8fc..d69fff8510ec67632f89b6a84d849dd3113290ea 100644
--- a/chrome/browser/chromeos/file_manager/volume_manager.cc
+++ b/chrome/browser/chromeos/file_manager/volume_manager.cc
@@ -348,8 +348,10 @@ VolumeManager* VolumeManager::Get(content::BrowserContext* context) {
 
 void VolumeManager::Initialize() {
   // If in Sign in profile, then skip mounting and listening for mount events.
-  if (chromeos::ProfileHelper::IsSigninProfile(profile_))
+  if (chromeos::ProfileHelper::IsSigninProfile(profile_) ||
+      chromeos::ProfileHelper::IsLockScreenAppProfile(profile_)) {
     return;
+  }
 
   // Register 'Downloads' folder for the profile to the file system.
   const base::FilePath downloads =