[Extensions] Make Event::restrict_to_browser_context const.

chrome/browser/extensions/menu_manager.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/extensions/menu_manager.h"
 
 #include <algorithm>
 #include <memory>
 #include <tuple>
 #include <utility>
@@ skipping 696 matching lines @@
   // Note: web_contents are null in unit tests :(
   if (web_contents && TabHelper::FromWebContents(web_contents)) {
     TabHelper::FromWebContents(web_contents)
         ->active_tab_permission_granter()
         ->GrantIfRequested(extension);
   }
 
   {
     // 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());
     event_router->DispatchEventToExtension(item->extension_id(),
                                            std::move(event));
   }
 }
 
 void MenuManager::SanitizeRadioList(const MenuItem::OwnedList& item_list) {
   auto i = item_list.begin();
@@ skipping 222 matching lines @@
 bool MenuItem::Id::operator!=(const Id& other) const {
   return !(*this == other);
 }
 
 bool MenuItem::Id::operator<(const Id& other) const {
   return std::tie(incognito, extension_key, uid, string_uid) <
     std::tie(other.incognito, other.extension_key, other.uid, other.string_uid);
 }
 
 }  // namespace extensions