Remove --show-app-list-shortcut flag and implement new app launcher enable logic.

chrome/browser/extensions/api/webstore_private/webstore_private_api.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/extensions/api/webstore_private/webstore_private_api.h"
 
 #include "apps/app_launcher.h"
-#include "apps/switches.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/lazy_instance.h"
 #include "base/memory/scoped_vector.h"
 #include "base/prefs/pref_service.h"
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
 #include "base/values.h"
 #include "chrome/browser/about_flags.h"
 #include "chrome/browser/browser_process.h"
@@ skipping 101 matching lines @@
   std::string username = profile->GetPrefs()->GetString(
       prefs::kGoogleServicesUsername);
   dictionary->SetString(kLoginKey, username);
   return dictionary;
 }
 
 WebstoreInstaller::Delegate* test_webstore_installer_delegate = NULL;
 
 void EnableAppLauncher(base::Callback<void(bool)> callback) {
 #if defined(OS_WIN)
-  if (BrowserDistribution::GetDistribution()->AppHostIsSupported()) {
-    LOG(INFO) << "Enabling App Launcher via installation";
-    extensions::AppHostInstaller::SetInstallWithLauncher(true);
-    extensions::AppHostInstaller::EnsureAppHostInstalled(callback);
-  } else {
-    LOG(INFO) << "Enabling App Launcher via flags";
-    about_flags::SetExperimentEnabled(g_browser_process->local_state(),
-                                      apps::switches::kShowAppListShortcut,
-                                      true);
-    AppListService::Get()->EnableAppList();
-    callback.Run(true);
-  }
+  LOG(INFO) << "Enabling App Launcher via internal enable";
+  AppListService::Get()->EnableAppList();
+  callback.Run(true);
 #else
   callback.Run(true);
 #endif
 }
 
 }  // namespace
 
 // static
 void WebstorePrivateApi::SetWebstoreInstallerDelegateForTesting(
     WebstoreInstaller::Delegate* delegate) {
@@ skipping 467 matching lines @@
       &GetIsLauncherEnabledFunction::OnIsLauncherCheckCompleted, this));
   return true;
 }
 
 void GetIsLauncherEnabledFunction::OnIsLauncherCheckCompleted(bool is_enabled) {
   SetResult(Value::CreateBooleanValue(is_enabled));
   SendResponse(true);
 }
 
 }  // namespace extensions