Remove code to defer app window appearance until first paint.

extensions/common/switches.cc

 // 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.
 
 #include "extensions/common/switches.h"
 
 namespace extensions {
 
 namespace switches {
 
 // Allows non-https URL for background_page for hosted apps.
 const char kAllowHTTPBackgroundPage[] = "allow-http-background-page";
 
 // Allows the browser to load extensions that lack a modern manifest when that
 // would otherwise be forbidden.
 const char kAllowLegacyExtensionManifests[] =
     "allow-legacy-extension-manifests";
 
 // Enables extension options to be embedded in chrome://extensions rather than
 // a new tab.
 const char kEmbeddedExtensionOptions[] = "embedded-extension-options";
 
-// Show apps windows after the first paint. Windows will be shown significantly
-// later for heavy apps loading resources synchronously but it will be
-// insignificant for apps that load most of their resources asynchronously.
-const char kEnableAppsShowOnFirstPaint[] = "enable-apps-show-on-first-paint";
-
 // Enables the <window-controls> tag in platform apps.
 const char kEnableAppWindowControls[] = "enable-app-window-controls";
 
 // Enable BLE Advertisiing in apps.
 const char kEnableBLEAdvertising[] = "enable-ble-advertising-in-apps";
 
 const char kDisableDesktopCaptureAudio[] =
     "disable-audio-support-for-desktop-share";
 
 // Hack so that feature switch can work with about_flags. See
@@ skipping 75 matching lines @@
 // Enables the use of C++-based extension bindings (instead of JS generation).
 const char kNativeCrxBindings[] = "native-crx-bindings";
 
 // Enable package hash check: the .crx file sha256 hash sum should be equal to
 // the one received from update manifest.
 const char kEnableCrxHashCheck[] = "enable-crx-hash-check";
 
 }  // namespace switches
 
 }  // namespace extensions