Change access mode of disk devices when mounting based on config.

chrome/browser/chromeos/file_manager/fake_disk_mount_manager.cc

Index: chrome/browser/chromeos/file_manager/fake_disk_mount_manager.cc
diff --git a/chrome/browser/chromeos/file_manager/fake_disk_mount_manager.cc b/chrome/browser/chromeos/file_manager/fake_disk_mount_manager.cc
index a01759e5aae93089cd2563477280631075788021..dff265b8354732226a61a82e96bc390641b9eba3 100644
--- a/chrome/browser/chromeos/file_manager/fake_disk_mount_manager.cc
+++ b/chrome/browser/chromeos/file_manager/fake_disk_mount_manager.cc
@@ -75,7 +75,8 @@ void FakeDiskMountManager::EnsureMountInfoRefreshed(
 void FakeDiskMountManager::MountPath(const std::string& source_path,
                                      const std::string& source_format,
                                      const std::string& mount_label,
-                                     chromeos::MountType type) {
+                                     chromeos::MountType type,
+                                     chromeos::MountAccessMode access_mode) {
   mount_requests_.push_back(
       MountRequest(source_path, source_format, mount_label, type));