mash: Fix launching touch hud app in mash mode.

ash/mus/accelerators/accelerator_controller_delegate_mus.cc

 // 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.
 
 #include "ash/mus/accelerators/accelerator_controller_delegate_mus.h"
 
 #include "base/logging.h"
+#include "mash/public/interfaces/launchable.mojom.h"
 
 namespace ash {
 namespace mus {
 
-AcceleratorControllerDelegateMus::AcceleratorControllerDelegateMus() {}
+AcceleratorControllerDelegateMus::AcceleratorControllerDelegateMus(
+    shell::Connector* connector)
+    : connector_(connector) {
+#if !defined(OS_CHROMEOS)
+  // To avoid trybot complaining that |connector_| is not being
+  // used in non-ChromeOS.
+  connector_ = nullptr;
+#endif
+}
 
 AcceleratorControllerDelegateMus::~AcceleratorControllerDelegateMus() {}
 
 bool AcceleratorControllerDelegateMus::HandlesAction(AcceleratorAction action) {
   // This is the list of actions that are not ported from aura. The actions are
   // replicated here to make sure we don't forget any. This list should
   // eventually be empty. If there are any actions that don't make sense for
   // mus, then they should be removed from AcceleratorAction.
   // http://crbug.com/612331.
   switch (action) {
@@ skipping 23 matching lines @@
     case DEBUG_TOGGLE_UNIFIED_DESKTOP:
     case DISABLE_GPU_WATCHDOG:
     case LOCK_PRESSED:
     case LOCK_RELEASED:
     case POWER_PRESSED:
     case POWER_RELEASED:
     case SWAP_PRIMARY_DISPLAY:
     case TOGGLE_MIRROR_MODE:
     case TOUCH_HUD_CLEAR:
     case TOUCH_HUD_MODE_CHANGE:
-    case TOUCH_HUD_PROJECTION_TOGGLE:
       NOTIMPLEMENTED();
       return false;
+    case TOUCH_HUD_PROJECTION_TOGGLE: {
+      mash::mojom::LaunchablePtr launchable;
+      connector_->ConnectToInterface("mojo:touch_hud", &launchable);
+      launchable->Launch(mash::mojom::kWindow,
+                         mash::mojom::LaunchMode::DEFAULT);
+      return true;
+    }
 #endif
 
     default:
       break;
   }
   return false;
 }
 
 bool AcceleratorControllerDelegateMus::CanPerformAction(
     AcceleratorAction action,
@@ skipping 13 matching lines @@
     const char* const notification_id,
     int message_id,
     int old_shortcut_id,
     int new_shortcut_id) {
   // TODO: http://crbug.com/630316.
   NOTIMPLEMENTED();
 }
 
 }  // namespace mus
 }  // namespace ash