Adds --enable-app-launcher command line switch

chrome/browser/dom_ui/app_launcher_handler.cc

 // Copyright (c) 2010 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/dom_ui/app_launcher_handler.h"
 
 #include "app/animation.h"
 #include "base/string_number_conversions.h"
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
@@ skipping 135 matching lines @@
   }
   dictionary->Set("apps", list);
 
   DefaultApps* default_apps = extensions_service_->default_apps();
   if (default_apps->ShouldShowPromo(extensions_service_->GetAppIds())) {
     dictionary->SetBoolean("showPromo", true);
     default_apps->DidShowPromo();
   } else {
     dictionary->SetBoolean("showPromo", false);
   }
+
+  bool showLauncher =
+      CommandLine::ForCurrentProcess()->HasSwitch(switches::kEnableAppLauncher);
+  dictionary->SetBoolean("showLauncher", showLauncher);
 }
 
 void AppLauncherHandler::HandleGetApps(const ListValue* args) {
   DictionaryValue dictionary;
   FillAppDictionary(&dictionary);
   dom_ui_->CallJavascriptFunction(L"getAppsCallback", dictionary);
 
   // First time we get here we set up the observer so that we can tell update
   // the apps as they change.
   if (registrar_.IsEmpty()) {
@@ skipping 118 matching lines @@
     return;
 
   extensions_service_->UninstallExtension(extension_id_prompting_,
                                           false /* external_uninstall */);
   extension_id_prompting_ = "";
 }
 
 void AppLauncherHandler::InstallUIAbort() {
   extension_id_prompting_ = "";
 }