Remove keyboard usability mode

ash/display/display_manager.cc

 // Copyright (c) 2012 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/display_manager.h"
 
 #include <algorithm>
 #include <cmath>
 #include <set>
 #include <string>
@@ skipping 417 matching lines @@
        iter != displays_.end(); ++iter) {
     DisplayInfo info = GetDisplayInfo(iter->id());
     if (info.id() == display_id) {
       if (info.rotation() == rotation)
         return;
       info.set_rotation(rotation);
     }
     display_info_list.push_back(info);
   }
   AddMirrorDisplayInfoIfAny(&display_info_list);
-  if (virtual_keyboard_root_window_enabled() &&
-      display_id == non_desktop_display_.id()) {
-    DisplayInfo info = GetDisplayInfo(display_id);
-    info.set_rotation(rotation);
-    display_info_list.push_back(info);
-  }
   UpdateDisplays(display_info_list);
 }
 
 void DisplayManager::SetDisplayUIScale(int64 display_id,
                                        float ui_scale) {
   if (!IsDisplayUIScalingEnabled() ||
       gfx::Display::InternalDisplayId() != display_id) {
     return;
   }
 
@@ skipping 617 matching lines @@
     display_info.set_device_scale_factor(
         display_info.device_scale_factor() == 1.0f ? 2.0f : 1.0f);
     new_display_info_list.push_back(display_info);
   }
   AddMirrorDisplayInfoIfAny(&new_display_info_list);
   UpdateDisplays(new_display_info_list);
 }
 
 #if defined(OS_CHROMEOS)
 void DisplayManager::SetSoftwareMirroring(bool enabled) {
-  // TODO(oshima|bshe): Support external display on the system
-  // that has virtual keyboard display.
-  if (second_display_mode_ == VIRTUAL_KEYBOARD)
-    return;
   SetSecondDisplayMode(enabled ? MIRRORING : EXTENDED);
 }
 
 bool DisplayManager::SoftwareMirroringEnabled() const {
   return software_mirroring_enabled();
 }
 #endif
 
 void DisplayManager::SetSecondDisplayMode(SecondDisplayMode mode) {
   second_display_mode_ = mode;
@@ skipping 173 matching lines @@
       new_secondary_origin.Offset(-secondary_bounds.width(), offset);
       break;
   }
   gfx::Insets insets = secondary_display->GetWorkAreaInsets();
   secondary_display->set_bounds(
       gfx::Rect(new_secondary_origin, secondary_bounds.size()));
   secondary_display->UpdateWorkAreaFromInsets(insets);
 }
 
 }  // namespace ash