Support transition between chrome and user mode console

ui/display/chromeos/display_configurator.cc

 // Copyright 2014 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 "ui/display/chromeos/display_configurator.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/strings/string_number_conversions.h"
@@ skipping 183 matching lines @@
     return;
 
   // If the delegate is already initialized don't update it (For example, tests
   // set their own delegates).
   if (!native_display_delegate_) {
     native_display_delegate_ = CreatePlatformNativeDisplayDelegate();
     native_display_delegate_->AddObserver(this);
   }
 }
 
+void DisplayConfigurator::TakeControl() {
+  NOTIMPLEMENTED();
+}
+
+void DisplayConfigurator::RelinquishControl() {
+  NOTIMPLEMENTED();
+}
+
 void DisplayConfigurator::ForceInitialConfigure(
     uint32_t background_color_argb) {
   if (!configure_display_)
     return;
 
   native_display_delegate_->GrabServer();
   native_display_delegate_->Initialize();
 
   UpdateCachedDisplays();
   if (cached_displays_.size() > 1 && background_color_argb)
@@ skipping 756 matching lines @@
         return state_controller_->GetStateForDisplayIds(display_ids);
       }
     }
     default:
       NOTREACHED();
   }
   return MULTIPLE_DISPLAY_STATE_INVALID;
 }
 
 }  // namespace ui