Revert "Delete the ViewManager and WindowManager services."

mojo/services/window_manager/interfaces/BUILD.gn

Index: mojo/services/window_manager/interfaces/BUILD.gn
diff --git a/mojo/services/native_viewport/interfaces/BUILD.gn b/mojo/services/window_manager/interfaces/BUILD.gn
similarity index 76%
copy from mojo/services/native_viewport/interfaces/BUILD.gn
copy to mojo/services/window_manager/interfaces/BUILD.gn
index 49a7d96c9f7d93881e537ee310c2025d5b786b62..e5415a178a7f77fd5f6c27835a1128de4d2357d0 100644
--- a/mojo/services/native_viewport/interfaces/BUILD.gn
+++ b/mojo/services/window_manager/interfaces/BUILD.gn
@@ -7,15 +7,16 @@ import("$mojo_sdk_root/mojo/public/tools/bindings/mojom.gni")
 
 mojom("interfaces") {
   sources = [
-    "native_viewport.mojom",
+    "window_manager.mojom",
+    "window_manager_internal.mojom",
   ]
 
   import_dirs = [ get_path_info("../../", "abspath") ]
 
-  public_deps = [
+  mojo_sdk_deps = [ "mojo/public/interfaces/application" ]
+
+  deps = [
     "../../geometry/interfaces",
-    "../../gpu/interfaces",
     "../../input_events/interfaces",
-    "../../surfaces/interfaces:surface_id",
   ]
 }