Mojo C++ bindings: switch part of the services/ui/public/interfaces mojom target to use STL types.

services/ui/ws/user_display_manager_unittest.cc

Index: services/ui/ws/user_display_manager_unittest.cc
diff --git a/services/ui/ws/user_display_manager_unittest.cc b/services/ui/ws/user_display_manager_unittest.cc
index 1380e9f9bdee720e216bc06dcb63a41d99fccb8f..8d0549f57a13b4169155e3f5f09475cc0dd466b9 100644
--- a/services/ui/ws/user_display_manager_unittest.cc
+++ b/services/ui/ws/user_display_manager_unittest.cc
@@ -72,7 +72,7 @@ class TestDisplayManagerObserver : public mojom::DisplayManagerObserver {
   }
 
   std::string DisplayIdsToString(
-      const mojo::Array<mojom::WsDisplayPtr>& wm_displays) {
+      const std::vector<mojom::WsDisplayPtr>& wm_displays) {
     std::string display_ids;
     for (const auto& wm_display : wm_displays) {
       if (!display_ids.empty())
@@ -83,12 +83,12 @@ class TestDisplayManagerObserver : public mojom::DisplayManagerObserver {
   }
 
   // mojom::DisplayManagerObserver:
-  void OnDisplays(mojo::Array<mojom::WsDisplayPtr> displays,
+  void OnDisplays(std::vector<mojom::WsDisplayPtr> displays,
                   int64_t primary_display_id,
                   int64_t internal_display_id) override {
     AddCall("OnDisplays " + DisplayIdsToString(displays));
   }
-  void OnDisplaysChanged(mojo::Array<mojom::WsDisplayPtr> displays) override {
+  void OnDisplaysChanged(std::vector<mojom::WsDisplayPtr> displays) override {
     AddCall("OnDisplaysChanged " + DisplayIdsToString(displays));
   }
   void OnDisplayRemoved(int64_t id) override {