mash: Move directly linked NewWindowDelegate to mojom::NewWindowClient.

ash/public/interfaces/new_window.mojom

+// Copyright 2016 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.
+
+module ash.mojom;
+
+// A delegate interface delegate to create or open windows that are not part of
+// ash.
+interface NewWindowClient {
+  // Invoked when the user uses Ctrl+T to open a new tab.
+  NewTab();
+
+  // Invoked when the user uses Ctrl-N or Ctrl-Shift-N to open a new window.
+  NewWindow(bool incognito);
+
+  // Invoked when an accelerator is used to open the file manager.
+  OpenFileManager();
+
+  // Invoked when the user opens Crosh.
+  OpenCrosh();
+
+  // Invoked when an accelerator is used to open help center.
+  OpenGetHelp();
+
+  // Invoked when the user uses Shift+Ctrl+T to restore the closed tab.
+  RestoreTab();
+
+  // Shows the keyboard shortcut overlay.
+  ShowKeyboardOverlay();
+
+  // Shows the task manager window.
+  ShowTaskManager();
+
+  // Opens the feedback page for "Report Issue".
+  OpenFeedbackPage();
+};