cros: Adds ShellPort functions for simplified display mode

ash/display/mirror_window_controller.cc

 // Copyright (c) 2013 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/display/mirror_window_controller.h"
 
 #include <utility>
 
 #if defined(USE_X11)
 #include <X11/extensions/XInput2.h>
@@ skipping 156 matching lines @@
           primary.bounds(), display));
     } else {
       NOTREACHED();
     }
 
     if (mirroring_host_info_map_.find(display_info.id()) ==
         mirroring_host_info_map_.end()) {
       AshWindowTreeHostInitParams init_params;
       init_params.initial_bounds = display_info.bounds_in_native();
       MirroringHostInfo* host_info = new MirroringHostInfo;
-      host_info->ash_host.reset(AshWindowTreeHost::Create(init_params));
+      host_info->ash_host = AshWindowTreeHost::Create(init_params);
       mirroring_host_info_map_[display_info.id()] = host_info;
 
       aura::WindowTreeHost* host = host_info->ash_host->AsWindowTreeHost();
       host->SetSharedInputMethod(
           Shell::Get()->window_tree_host_manager()->input_method());
       host->window()->SetName(
           base::StringPrintf("MirrorRootWindow-%d", mirror_host_count++));
       host->compositor()->SetBackgroundColor(SK_ColorBLACK);
       // No need to remove the observer because the WindowTreeHostManager
       // outlives the host.
@@ skipping 179 matching lines @@
   // EventProcessor may be accessed after this call if the mirroring window
   // was deleted as a result of input event (e.g. shortcut), so don't delete
   // now.
   if (delay_host_deletion)
     base::ThreadTaskRunnerHandle::Get()->DeleteSoon(FROM_HERE, host_info);
   else
     delete host_info;
 }
 
 }  // namespace ash