Introduce profile for lock screen apps

chrome/browser/chromeos/file_system_provider/mount_path_util.cc

Index: chrome/browser/chromeos/file_system_provider/mount_path_util.cc
diff --git a/chrome/browser/chromeos/file_system_provider/mount_path_util.cc b/chrome/browser/chromeos/file_system_provider/mount_path_util.cc
index cd568f0b6e86988ac460caa9373d0f6e1e59d1e2..36cd14041e5e34eec96b73a9d206e7b49e370771 100644
--- a/chrome/browser/chromeos/file_system_provider/mount_path_util.cc
+++ b/chrome/browser/chromeos/file_system_provider/mount_path_util.cc
@@ -100,7 +100,8 @@ bool FileSystemURLParser::Parse() {
     Profile* original_profile = profiles[i]->GetOriginalProfile();
 
     if (original_profile != profiles[i] ||
-        chromeos::ProfileHelper::IsSigninProfile(original_profile)) {
+        chromeos::ProfileHelper::IsSigninProfile(original_profile) ||
+        chromeos::ProfileHelper::IsLockScreenAppProfile(original_profile)) {
       continue;
     }