[Extensions] Make Event::restrict_to_browser_context const.

chrome/browser/extensions/menu_manager.cc

Index: chrome/browser/extensions/menu_manager.cc
diff --git a/chrome/browser/extensions/menu_manager.cc b/chrome/browser/extensions/menu_manager.cc
index fee129eafcbea0ad3584bfb24e758ef04ed1412c..4d12677ecdd90dc1ee6a9baa666884869f21a514 100644
--- a/chrome/browser/extensions/menu_manager.cc
+++ b/chrome/browser/extensions/menu_manager.cc
@@ -714,25 +714,23 @@ void MenuManager::ExecuteCommand(content::BrowserContext* context,
   {
     // Dispatch to menu item's .onclick handler (this is the legacy API, from
     // before chrome.contextMenus.onClicked existed).
-    std::unique_ptr<Event> event(
-        new Event(webview_guest ? events::WEB_VIEW_INTERNAL_CONTEXT_MENUS
-                                : events::CONTEXT_MENUS,
-                  webview_guest ? kOnWebviewContextMenus : kOnContextMenus,
-                  std::unique_ptr<base::ListValue>(args->DeepCopy())));
-    event->restrict_to_browser_context = context;
+    auto event = base::MakeUnique<Event>(
+        webview_guest ? events::WEB_VIEW_INTERNAL_CONTEXT_MENUS
+                      : events::CONTEXT_MENUS,
+        webview_guest ? kOnWebviewContextMenus : kOnContextMenus,
+        std::unique_ptr<base::ListValue>(args->DeepCopy()), context);
     event->user_gesture = EventRouter::USER_GESTURE_ENABLED;
     event_router->DispatchEventToExtension(item->extension_id(),
                                            std::move(event));
   }
   {
     // Dispatch to .contextMenus.onClicked handler.
-    std::unique_ptr<Event> event(new Event(
+    auto event = base::MakeUnique<Event>(
         webview_guest ? events::CHROME_WEB_VIEW_INTERNAL_ON_CLICKED
                       : events::CONTEXT_MENUS_ON_CLICKED,
         webview_guest ? api::chrome_web_view_internal::OnClicked::kEventName
                       : api::context_menus::OnClicked::kEventName,
-        std::move(args)));
-    event->restrict_to_browser_context = context;
+        std::move(args), context);
     event->user_gesture = EventRouter::USER_GESTURE_ENABLED;
     if (webview_guest)
       event->filter_info.SetInstanceID(webview_guest->view_instance_id());