Flip --enable-apps-show-on-first-paint flag.

apps/app_window.h

 // 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.
 
 #ifndef APPS_APP_WINDOW_H_
 #define APPS_APP_WINDOW_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "chrome/browser/extensions/extension_icon_image.h"
@@ skipping 51 matching lines @@
 
   // Called to load the contents, after the app window is created.
   virtual void LoadContents(int32 creator_process_id) = 0;
 
   // Called when the native window changes.
   virtual void NativeWindowChanged(NativeAppWindow* native_app_window) = 0;
 
   // Called when the native window closes.
   virtual void NativeWindowClosed() = 0;
 
+  // Called with the native window is first shown.
+  virtual void NativeWindowFirstShown() const = 0;
+
   virtual content::WebContents* GetWebContents() const = 0;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(AppWindowContents);
 };
 
 // AppWindow is the type of window used by platform apps. App windows
 // have a WebContents but none of the chrome of normal browser windows.
 class AppWindow : public content::NotificationObserver,
                   public content::WebContentsDelegate,
@@ skipping 434 matching lines @@
   // Bit field of FullscreenType.
   int fullscreen_types_;
 
   // Show has been called, so the window should be shown once the first visually
   // non-empty paint occurs.
   bool show_on_first_paint_;
 
   // The first visually non-empty paint has completed.
   bool first_paint_complete_;
 
+  // The window has been shown.
+  bool has_been_shown_;
+
   // Whether the window is hidden or not. Hidden in this context means actively
   // by the chrome.app.window API, not in an operating system context. For
   // example windows which are minimized are not hidden, and windows which are
   // part of a hidden app on OS X are not hidden. Windows which were created
   // with the |hidden| flag set to true, or which have been programmatically
   // hidden, are considered hidden.
   bool is_hidden_;
 
   // Whether the delayed Show() call was for an active or inactive window.
   ShowType delayed_show_type_;
 
   // Cache the desired value of the always-on-top property. When windows enter
   // fullscreen or overlap the Windows taskbar, this property will be
   // automatically and silently switched off for security reasons. It is
   // reinstated when the window exits fullscreen and moves away from the
   // taskbar.
   bool cached_always_on_top_;
 
   DISALLOW_COPY_AND_ASSIGN(AppWindow);
 };
 
 }  // namespace apps
 
 #endif  // APPS_APP_WINDOW_H_