Add tooltip text for chrome shortcut

ash/shell/launcher_delegate_impl.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 "ash/shell/launcher_delegate_impl.h"
 
 #include "ash/shell/toplevel_window.h"
 #include "ash/shell/window_watcher.h"
 #include "ash/wm/window_util.h"
 #include "grit/ui_resources.h"
 #include "ui/aura/window.h"
 
 namespace ash {
 namespace shell {
 
 LauncherDelegateImpl::LauncherDelegateImpl(WindowWatcher* watcher)
     : watcher_(watcher) {
 }
 
 LauncherDelegateImpl::~LauncherDelegateImpl() {
 }
 
+// In the shell we'll create a window all the time.
 void LauncherDelegateImpl::CreateNewTab() {
+  CreateNewWindow();
+}
+
+void LauncherDelegateImpl::CreateNewWindow() {
   ash::shell::ToplevelWindow::CreateParams create_params;
   create_params.can_resize = true;
   create_params.can_maximize = true;
   ash::shell::ToplevelWindow::CreateToplevelWindow(create_params);
 }
 
 void LauncherDelegateImpl::ItemClicked(const ash::LauncherItem& item) {
   aura::Window* window = watcher_->GetWindowByID(item.id);
   window->Show();
   ash::wm::ActivateWindow(window);
@@ skipping 11 matching lines @@
     const ash::LauncherItem& item) {
   return NULL;
 }
 
 ash::LauncherID LauncherDelegateImpl::GetIDByWindow(aura::Window* window) {
   return watcher_->GetIDByWindow(window);
 }
 
 }  // namespace shell
 }  // namespace ash