fuchsia: update SelectFileDialog after unique_ptr change

Signature changed at
https://chromium-review.googlesource.com/c/chromium/src/+/619613, but
there's only a fuchsia release, no fuchsia (dbg) on the CQ/waterfall
yet, and it happens to link in release without this.

Bug: 743296, 746674
Change-Id: Ifeb7663a9338b9e424ebb39fac6408989ca0b43c
Reviewed-on: https://chromium-review.googlesource.com/629199
Reviewed-by: Scott Violet <[email protected]>
Commit-Queue: Scott Graham <[email protected]>
Cr-Commit-Position: refs/heads/master@{#496769}
diff --git a/ui/shell_dialogs/select_file_dialog_fuchsia.cc b/ui/shell_dialogs/select_file_dialog_fuchsia.cc
index 03d2db9..ff3e29e 100644
--- a/ui/shell_dialogs/select_file_dialog_fuchsia.cc
+++ b/ui/shell_dialogs/select_file_dialog_fuchsia.cc
@@ -8,8 +8,9 @@
 
 namespace ui {
 
-SelectFileDialog* CreateSelectFileDialog(SelectFileDialog::Listener* listener,
-                                         SelectFilePolicy* policy) {
+SelectFileDialog* CreateSelectFileDialog(
+    SelectFileDialog::Listener* listener,
+    std::unique_ptr<SelectFilePolicy> policy) {
   // TODO(fuchsia): Port once we have UI, see https://crbug.com/746674.
   NOTREACHED();
   return nullptr;