Remove unused packaged app window controls code.

chrome/browser/chrome_content_browser_client.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 "chrome/browser/chrome_content_browser_client.h"
 
 #include <map>
 #include <set>
 #include <utility>
 #include <vector>
@@ skipping 1707 matching lines @@
 #endif
       autofill::switches::kDisablePasswordGeneration,
       autofill::switches::kEnablePasswordGeneration,
       autofill::switches::kEnableSingleClickAutofill,
       autofill::switches::kEnableSuggestionsWithSubstringMatch,
       autofill::switches::kIgnoreAutocompleteOffForAutofill,
       autofill::switches::kLocalHeuristicsOnlyForPasswordGeneration,
 #if BUILDFLAG(ENABLE_EXTENSIONS)
       extensions::switches::kAllowHTTPBackgroundPage,
       extensions::switches::kAllowLegacyExtensionManifests,
-      extensions::switches::kEnableAppWindowControls,
       extensions::switches::kEnableEmbeddedExtensionOptions,
       extensions::switches::kEnableExperimentalExtensionApis,
       extensions::switches::kExtensionsOnChromeURLs,
       extensions::switches::kIsolateExtensions,
       extensions::switches::kNativeCrxBindings,
       extensions::switches::kWhitelistedExtensionID,
 #endif
       switches::kAllowInsecureLocalhost,
       switches::kAppsGalleryURL,
       switches::kCloudPrintURL,
@@ skipping 1575 matching lines @@
       render_frame_host, std::move(source), std::move(request));
 #else
   // Chrome's media remoting implementation depends on the Media Router
   // infrastructure to identify remote sinks and provide the user interface for
   // sink selection. In the case where the Media Router is not present, simply
   // drop the interface request. This will prevent code paths for media remoting
   // in the renderer process from activating.
 #endif
 }
 #endif  // BUILDFLAG(ENABLE_MEDIA_REMOTING)