[Extensions] Make Event::restrict_to_browser_context const.

chrome/browser/extensions/api/tabs/windows_event_router.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/api/tabs/windows_event_router.h"
 
 #include <utility>
 
 #include "base/memory/ptr_util.h"
 #include "base/values.h"
@@ skipping 246 matching lines @@
       base::MakeUnique<base::ListValue>());
   event->will_dispatch_callback =
       base::Bind(&WillDispatchWindowFocusedEvent, window_controller);
   EventRouter::Get(profile_)->BroadcastEvent(std::move(event));
 }
 
 void WindowsEventRouter::DispatchEvent(events::HistogramValue histogram_value,
                                        const std::string& event_name,
                                        WindowController* window_controller,
                                        std::unique_ptr<base::ListValue> args) {
-  std::unique_ptr<Event> event =
-      base::MakeUnique<Event>(histogram_value, event_name, std::move(args));
-  event->restrict_to_browser_context = window_controller->profile();
+  auto event =
+      base::MakeUnique<Event>(histogram_value, event_name, std::move(args),
+                              window_controller->profile());
   event->will_dispatch_callback =
       base::Bind(&WillDispatchWindowEvent, window_controller);
   EventRouter::Get(profile_)->BroadcastEvent(std::move(event));
 }
 
 bool WindowsEventRouter::HasEventListener(const std::string& event_name) {
   return EventRouter::Get(profile_)->HasEventListener(event_name);
 }
 
 void WindowsEventRouter::AddAppWindow(extensions::AppWindow* app_window) {
   std::unique_ptr<AppWindowController> controller(new AppWindowController(
       app_window, base::MakeUnique<AppBaseWindow>(app_window), profile_));
   app_windows_[app_window->session_id().id()] = std::move(controller);
 }
 
 }  // namespace extensions