mustash: Connect ash system tray "show settings" items to chrome over mojo

ash/public/interfaces/system_tray.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;
 
 // Allows clients (e.g. Chrome browser) to control the ash system tray menu.
 interface SystemTray {
   // Sets the clock to use 24 hour time formatting if |use_24_hour| is true.
   // Otherwise sets 12 hour time formatting.
   SetUse24HourClock(bool use_24_hour);
 };
 
 // Allows ash system tray to control a client (e.g. Chrome browser). Requests
 // often involve preferences or web UI that is not available to ash.
 interface SystemTrayClient {
+  // Shows general settings UI.
+  ShowSettings();
+
   // Shows the settings related to date, timezone etc.
   ShowDateSettings();
+
+  // TODO(crbug.com/647412): ShowSetTimeDialog();
+
+  // TODO(crbug.com/647412): ShowNetworkSettingsForGuid(string guid);
+
+  // Shows settings related to multiple displays.
+  ShowDisplaySettings();
+
+  // TODO(crbug.com/647412): ShowPowerSettings();
+
+  // Shows the page that lets you disable performance tracing.
+  ShowChromeSlow();
+
+  // Shows settings related to input methods.
+  ShowIMESettings();
+
+  // Shows help.
+  ShowHelp();
+
+  // Show accessibility help.
+  ShowAccessibilityHelp();
+
+  // Show the settings related to accessibility.
+  ShowAccessibilitySettings();
+
+  // Shows the help center article for the stylus tool palette.
+  ShowPaletteHelp();
+
+  // Shows the settings related to the stylus tool palette.
+  ShowPaletteSettings();
+
+  // Shows information about public account mode.
+  ShowPublicAccountInfo();
+
+  // TODO(crbug.com/647412): ShowEnterpriseInfo();
+
+  // Shows UI for changing proxy settings.
+  ShowProxySettings();
 };