Add support for a virtual display on ChromeOS

ash/display/display_change_observer_chromeos.cc

 // Copyright 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/display_change_observer_chromeos.h"
 
 #include <algorithm>
 #include <map>
 #include <set>
 #include <string>
@@ skipping 193 matching lines @@
       }
     } else {
       DisplayMode mode;
       if (Shell::GetInstance()->display_manager()->GetSelectedModeForDisplayId(
               state.display->display_id(), &mode)) {
         device_scale_factor = mode.device_scale_factor;
       }
     }
     gfx::Rect display_bounds(state.display->origin(), mode_info->size());
 
-    std::string name =
-        state.display->type() == ui::DISPLAY_CONNECTION_TYPE_INTERNAL ?
-            l10n_util::GetStringUTF8(IDS_ASH_INTERNAL_DISPLAY_NAME) :
-            state.display->display_name();
+    std::string name;
+    switch (state.display->type()) {
+      case ui::DISPLAY_CONNECTION_TYPE_INTERNAL:
+        name = l10n_util::GetStringUTF8(IDS_ASH_INTERNAL_DISPLAY_NAME);
+        break;
+      case ui::DISPLAY_CONNECTION_TYPE_VIRTUAL:
+        name = l10n_util::GetStringUTF8(IDS_ASH_VIRTUAL_DISPLAY_NAME);
+        break;
+      default:
+        name = state.display->display_name();
+    }
+
     if (name.empty())
       name = l10n_util::GetStringUTF8(IDS_ASH_STATUS_TRAY_UNKNOWN_DISPLAY_NAME);
 
     bool has_overscan = state.display->has_overscan();
     int64 id = state.display->display_id();
     ids.insert(id);
 
     displays.push_back(DisplayInfo(id, name, has_overscan));
     DisplayInfo& new_info = displays.back();
     new_info.set_device_scale_factor(device_scale_factor);
@@ skipping 53 matching lines @@
   }
   return 1.0f;
 }
 
 void DisplayChangeObserver::OnTouchscreenDeviceConfigurationChanged() {
   OnDisplayModeChanged(
       Shell::GetInstance()->display_configurator()->cached_displays());
 }
 
 }  // namespace ash