Move enable_app_list to a buildflag.

chrome/browser/extensions/component_loader.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/component_loader.h"
 
 #include <string>
 
 #include "base/command_line.h"
 #include "base/files/file_util.h"
@@ skipping 390 matching lines @@
   base::DictionaryValue* manifest = ParseManifest(manifest_contents);
 
   if (manifest) {
     manifest->SetString(manifest_keys::kName, name_string);
     manifest->SetString(manifest_keys::kDescription, description_string);
     Add(manifest, root_directory, true);
   }
 }
 
 void ComponentLoader::AddChromeApp() {
-#if defined(ENABLE_APP_LIST)
+#if BUILDFLAG(ENABLE_APP_LIST)
   AddWithNameAndDescription(
       IDR_CHROME_APP_MANIFEST, base::FilePath(FILE_PATH_LITERAL("chrome_app")),
       l10n_util::GetStringUTF8(IDS_SHORT_PRODUCT_NAME),
       l10n_util::GetStringUTF8(IDS_CHROME_SHORTCUT_DESCRIPTION));
 #endif
 }
 
 void ComponentLoader::AddKeyboardApp() {
 #if defined(OS_CHROMEOS)
   Add(IDR_KEYBOARD_MANIFEST, base::FilePath(FILE_PATH_LITERAL("keyboard")));
@@ skipping 268 matching lines @@
       manifest.release(),
       root_directory,
       false);
   CHECK_EQ(extension_id, actual_extension_id);
   if (!done_cb.is_null())
     done_cb.Run();
 }
 #endif
 
 }  // namespace extensions