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

chrome/browser/about_flags.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/about_flags.h"
 
 #include <string.h>
 
 #include <algorithm>
 #include <iterator>
 #include <map>
 #include <set>
 #include <utility>
 
-#include "apps/switches.h"
 #include "base/command_line.h"
 #include "base/memory/singleton.h"
 #include "base/prefs/pref_service.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/utf_string_conversions.h"
 #include "base/values.h"
 #include "cc/base/switches.h"
 #include "chrome/browser/prefs/scoped_user_pref_update.h"
 #include "chrome/common/chrome_content_client.h"
 #include "chrome/common/chrome_switches.h"
@@ skipping 1164 matching lines @@
     SINGLE_VALUE_TYPE(switches::kPerformanceMonitorGathering)
   },
   {
     "disable-native-autofill-ui",
     IDS_FLAGS_DISABLE_NATIVE_AUTOFILL_UI_NAME,
     IDS_FLAGS_DISABLE_NATIVE_AUTOFILL_UI_DESCRIPTION,
     kOsDesktop,
     SINGLE_VALUE_TYPE(switches::kDisableNativeAutofillUi)
   },
   {
-    "show-app-list-shortcut",
-    IDS_FLAGS_SHOW_APP_LIST_SHORTCUT_NAME,
-    IDS_FLAGS_SHOW_APP_LIST_SHORTCUT_DESCRIPTION,
-    kOsWin,
-    SINGLE_VALUE_TYPE(apps::switches::kShowAppListShortcut)
-  },
-  {
     "enable-experimental-form-filling",
     IDS_FLAGS_ENABLE_EXPERIMENTAL_FORM_FILLING_NAME,
     IDS_FLAGS_ENABLE_EXPERIMENTAL_FORM_FILLING_DESCRIPTION,
     kOsWin | kOsCrOS,
     SINGLE_VALUE_TYPE(autofill::switches::kEnableExperimentalFormFilling)
   },
   {
     "wallet-service-use-prod",
     IDS_FLAGS_ENABLE_WALLET_PRODUCTION_SERVICE_NAME,
     IDS_FLAGS_ENABLE_WALLET_PRODUCTION_SERVICE_DESCRIPTION,
@@ skipping 627 matching lines @@
 }
 
 const Experiment* GetExperiments(size_t* count) {
   *count = num_experiments;
   return experiments;
 }
 
 }  // namespace testing
 
 }  // namespace about_flags