Remove code to defer app window appearance until first paint.

chrome/browser/extensions/api/tabs/ash_panel_contents.h

 // Copyright 2013 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.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_API_TABS_ASH_PANEL_CONTENTS_H_
 #define CHROME_BROWSER_EXTENSIONS_API_TABS_ASH_PANEL_CONTENTS_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 18 matching lines @@
   ~AshPanelContents() override;
 
   // extensions::AppWindowContents
   void Initialize(content::BrowserContext* context,
                   content::RenderFrameHost* creator_frame,
                   const GURL& url) override;
   void LoadContents(int32_t creator_process_id) override;
   void NativeWindowChanged(
       extensions::NativeAppWindow* native_app_window) override;
   void NativeWindowClosed() override;
-  void DispatchWindowShownForTests() const override;
   void OnWindowReady() override;
   content::WebContents* GetWebContents() const override;
   extensions::WindowController* GetWindowController() const override;
 
   // LauncherFaviconLoader::Delegate overrides:
   void FaviconUpdated() override;
 
   LauncherFaviconLoader* launcher_favicon_loader_for_test() {
     return launcher_favicon_loader_.get();
   }
 
  private:
   extensions::AppWindow* host_;
   GURL url_;
   std::unique_ptr<content::WebContents> web_contents_;
   std::unique_ptr<LauncherFaviconLoader> launcher_favicon_loader_;
 
   DISALLOW_COPY_AND_ASSIGN(AshPanelContents);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_TABS_ASH_PANEL_CONTENTS_H_