Remove code to defer app window appearance until first paint.

extensions/browser/app_window/test_app_window_contents.cc

 // Copyright 2014 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/app_window/test_app_window_contents.h"
 
 #include "content/public/browser/web_contents.h"
 
 namespace extensions {
 
@@ skipping 10 matching lines @@
 
 void TestAppWindowContents::LoadContents(int32_t creator_process_id) {}
 
 void TestAppWindowContents::NativeWindowChanged(
     NativeAppWindow* native_app_window) {
 }
 
 void TestAppWindowContents::NativeWindowClosed() {
 }
 
-void TestAppWindowContents::DispatchWindowShownForTests() const {
-}
-
 void TestAppWindowContents::OnWindowReady() {}
 
 content::WebContents* TestAppWindowContents::GetWebContents() const {
   return web_contents_.get();
 }
 
 WindowController* TestAppWindowContents::GetWindowController() const {
   return nullptr;
 }
 
 }  // namespace extensions