Add a skeleton Start Page to the experimental app list.

ui/app_list/app_list_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 "ui/app_list/app_list_switches.h"
 
 #include "base/command_line.h"
 
 namespace app_list {
 namespace switches {
 
-// If set, the experimental app list will be used.
-const char kEnableExperimentalAppList[] = "enable-experimental-app-list";
-
 // If set, folder will be disabled in app list UI.
 const char kDisableFolderUI[] = "disable-app-list-folder-ui";
 
 // If set, the voice search is disabled in app list UI.
 const char kDisableVoiceSearch[] = "disable-app-list-voice-search";
 
+// If set, the app info context menu item is available in the app list UI.
+const char kEnableAppInfo[] = "enable-app-list-app-info";
+
+// If set, the experimental app list will be used.
+const char kEnableExperimentalAppList[] = "enable-experimental-app-list";
+
 // If set, it will always listen to the audio locally and open the app-list
 // when the hotword is recognized.
 const char kEnableHotwordAlwaysOn[] = "enable-app-list-hotword-always-on";
 
-// If set, the app info context menu item is available in the app list UI.
-const char kEnableAppInfo[] = "enable-app-list-app-info";
+// If set, the app list will show the start page webui.
+const char kShowAppListStartPage[] = "show-app-list-start-page";

[xiyuan, 2014/03/14 17:00:54]

Can we get rid of this and use just kEnableExperimentalAppList? Start page is
dead and replaced by the new UI. It should be okay to drop it.

[calamity, 2014/05/07 06:11:52]

Done.

 
 // Folder UI is enabled by default.
 bool IsFolderUIEnabled() {
   return !CommandLine::ForCurrentProcess()->HasSwitch(kDisableFolderUI);
 }
 
 bool IsVoiceSearchEnabled() {
   // Speech recognition in AppList is only for ChromeOS right now.
 #if defined(OS_CHROMEOS)
   return !CommandLine::ForCurrentProcess()->HasSwitch(kDisableVoiceSearch);
@@ skipping 13 matching lines @@
 
 bool IsAppInfoEnabled() {
   return CommandLine::ForCurrentProcess()->HasSwitch(kEnableAppInfo);
 }
 
 bool IsExperimentalAppListEnabled() {
   return CommandLine::ForCurrentProcess()->HasSwitch(
       kEnableExperimentalAppList);
 }
 
+bool IsStartPageWebUIEnabled() {
+  return CommandLine::ForCurrentProcess()->HasSwitch(kShowAppListStartPage);
+}
+
 }  // namespace switches
 }  // namespace app_list