Add chrome/browser/extensions to "GN check"

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 141 matching lines @@
 #else
 #error Unsupported
 #endif
 
   AppWindowRegistry* registry = AppWindowRegistry::Get(profile_);
   for (AppWindow* app_window : registry->app_windows())
     AddAppWindow(app_window);
 }
 
 WindowsEventRouter::~WindowsEventRouter() {
-#if !defined(OS_MACOSX)
+#if defined(TOOLKIT_VIEWS) && !defined(OS_MACOSX)
   views::WidgetFocusManager::GetInstance()->RemoveFocusChangeListener(this);
 #endif
 }
 
 void WindowsEventRouter::OnAppWindowAdded(extensions::AppWindow* app_window) {
   if (!profile_->IsSameProfile(
           Profile::FromBrowserContext(app_window->browser_context())))
     return;
   AddAppWindow(app_window);
 }
@@ skipping 34 matching lines @@
   if (!profile_->IsSameProfile(window_controller->profile()))
     return;
 
   int window_id = window_controller->GetWindowId();
   std::unique_ptr<base::ListValue> args(new base::ListValue());
   args->AppendInteger(window_id);
   DispatchEvent(events::WINDOWS_ON_REMOVED, windows::OnRemoved::kEventName,
                 window_controller, std::move(args));
 }
 
-#if !defined(OS_MACOSX)
+#if defined(TOOLKIT_VIEWS) && !defined(OS_MACOSX)
 void WindowsEventRouter::OnNativeFocusChanged(gfx::NativeView focused_now) {
   if (!focused_now)
     OnActiveWindowChanged(nullptr);
 }
 #endif
 
 void WindowsEventRouter::Observe(
     int type,
     const content::NotificationSource& source,
     const content::NotificationDetails& details) {
@@ skipping 48 matching lines @@
   return EventRouter::Get(profile_)->HasEventListener(event_name);
 }
 
 void WindowsEventRouter::AddAppWindow(extensions::AppWindow* app_window) {
   std::unique_ptr<AppWindowController> controller(new AppWindowController(
       app_window, base::WrapUnique(new AppBaseWindow(app_window)), profile_));
   app_windows_[app_window->session_id().id()] = std::move(controller);
 }
 
 }  // namespace extensions