diff --git a/atom/browser/api/atom_api_tray.cc b/atom/browser/api/atom_api_tray.cc
index f3dd57b738..649967a2b1 100644
--- a/atom/browser/api/atom_api_tray.cc
+++ b/atom/browser/api/atom_api_tray.cc
@@ -110,7 +110,7 @@ void Tray::SetContextMenu(mate::Arguments* args, Menu* menu) {
 void Tray::BuildPrototype(v8::Isolate* isolate,
                           v8::Local<v8::ObjectTemplate> prototype) {
   mate::ObjectTemplateBuilder(isolate, prototype)
-      .SetMethod("destroy", &Tray::Destroy)
+      .SetMethod("destroy", &Tray::Destroy, true)
       .SetMethod("setImage", &Tray::SetImage)
       .SetMethod("setPressedImage", &Tray::SetPressedImage)
       .SetMethod("setToolTip", &Tray::SetToolTip)
diff --git a/atom/browser/api/atom_api_web_contents.cc b/atom/browser/api/atom_api_web_contents.cc
index 480cb51c30..e2d1b31ae3 100644
--- a/atom/browser/api/atom_api_web_contents.cc
+++ b/atom/browser/api/atom_api_web_contents.cc
@@ -740,8 +740,8 @@ mate::ObjectTemplateBuilder WebContents::GetObjectTemplateBuilder(
     v8::Isolate* isolate) {
   if (template_.IsEmpty())
     template_.Reset(isolate, mate::ObjectTemplateBuilder(isolate)
-        .SetMethod("destroy", &WebContents::Destroy)
-        .SetMethod("isAlive", &WebContents::IsAlive)
+        .SetMethod("destroy", &WebContents::Destroy, true)
+        .SetMethod("isAlive", &WebContents::IsAlive, true)
         .SetMethod("getId", &WebContents::GetID)
         .SetMethod("equal", &WebContents::Equal)
         .SetMethod("_loadUrl", &WebContents::LoadURL)
@@ -775,7 +775,7 @@ mate::ObjectTemplateBuilder WebContents::GetObjectTemplateBuilder(
         .SetMethod("unselect", &WebContents::Unselect)
         .SetMethod("replace", &WebContents::Replace)
         .SetMethod("replaceMisspelling", &WebContents::ReplaceMisspelling)
-        .SetMethod("_send", &WebContents::SendIPCMessage)
+        .SetMethod("_send", &WebContents::SendIPCMessage, true)
         .SetMethod("setSize", &WebContents::SetSize)
         .SetMethod("setAllowTransparency", &WebContents::SetAllowTransparency)
         .SetMethod("isGuest", &WebContents::IsGuest)
diff --git a/atom/browser/api/atom_api_window.cc b/atom/browser/api/atom_api_window.cc
index b47e9e4f55..d5bce58911 100644
--- a/atom/browser/api/atom_api_window.cc
+++ b/atom/browser/api/atom_api_window.cc
@@ -481,7 +481,7 @@ v8::Local<v8::Value> Window::DevToolsWebContents(v8::Isolate* isolate) {
 void Window::BuildPrototype(v8::Isolate* isolate,
                             v8::Local<v8::ObjectTemplate> prototype) {
   mate::ObjectTemplateBuilder(isolate, prototype)
-      .SetMethod("destroy", &Window::Destroy)
+      .SetMethod("destroy", &Window::Destroy, true)
       .SetMethod("close", &Window::Close)
       .SetMethod("isClosed", &Window::IsClosed)
       .SetMethod("focus", &Window::Focus)
@@ -544,9 +544,9 @@ void Window::BuildPrototype(v8::Isolate* isolate,
       .SetMethod("showDefinitionForSelection",
                  &Window::ShowDefinitionForSelection)
 #endif
-      .SetProperty("id", &Window::ID)
-      .SetProperty("webContents", &Window::WebContents)
-      .SetProperty("devToolsWebContents", &Window::DevToolsWebContents);
+      .SetProperty("id", &Window::ID, true)
+      .SetProperty("webContents", &Window::WebContents, true)
+      .SetProperty("devToolsWebContents", &Window::DevToolsWebContents, true);
 }
 
 }  // namespace api
diff --git a/atom/browser/lib/guest-window-manager.coffee b/atom/browser/lib/guest-window-manager.coffee
index e26c93513c..fb961dddef 100644
--- a/atom/browser/lib/guest-window-manager.coffee
+++ b/atom/browser/lib/guest-window-manager.coffee
@@ -23,7 +23,7 @@ createGuest = (embedder, url, frameName, options) ->
   closedByEmbedder = ->
     embedder.send 'ATOM_SHELL_GUEST_WINDOW_MANAGER_WINDOW_CLOSED', guest.id
     guest.removeListener 'closed', closedByUser
-    guest.destroy() unless guest.isClosed()
+    guest.destroy()
   closedByUser = ->
     embedder.send 'ATOM_SHELL_GUEST_WINDOW_MANAGER_WINDOW_CLOSED', guest.id
     embedder.removeListener 'render-view-deleted', closedByEmbedder
diff --git a/vendor/native_mate b/vendor/native_mate
index 7b9926807d..41cd6d13c9 160000
--- a/vendor/native_mate
+++ b/vendor/native_mate
@@ -1 +1 @@
-Subproject commit 7b9926807d330ec173e912f28b86f843225a3286
+Subproject commit 41cd6d13c9c9be164f427864277f3cc36b69eb39