Remove code to defer app window appearance until first paint.

extensions/browser/api/app_window/app_window_api.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 "extensions/browser/api/app_window/app_window_api.h"
 
 #include <memory>
 #include <utility>
 
 #include "base/command_line.h"
@@ skipping 386 matching lines @@
   // PlzNavigate: delay sending the response until the newly created window has
   // been told to navigate, and blink has been correctly initialized in the
   // renderer.
   if (content::IsBrowserSideNavigationEnabled()) {
     app_window->SetOnFirstCommitCallback(
         base::Bind(&AppWindowCreateFunction::SendResponse, this, true));
     return true;
   }
 
   SendResponse(true);
-  app_window->WindowEventsReady();
 
   return true;
 }
 
 bool AppWindowCreateFunction::GetBoundsSpec(
     const app_window::CreateWindowOptions& options,
     AppWindow::CreateParams* params,
     std::string* error) {
   DCHECK(params);
   DCHECK(error);
@@ skipping 157 matching lines @@
 
   if (options.frame->as_frame_options->inactive_color.get()) {
     error_ = app_window_constants::kInactiveColorWithoutColor;
     return false;
   }
 
   return true;
 }
 
 }  // namespace extensions