Add support for a virtual display on ChromeOS

ui/display/chromeos/display_util.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_util.h"
 
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/stringprintf.h"
 #include "ui/display/types/display_snapshot.h"
 
@@ skipping 38 matching lines @@
     chromeos::DisplayPowerState state,
     std::vector<bool>* display_power) {
   int num_on_displays = 0;
   if (display_power)
     display_power->resize(display_states.size());
 
   for (size_t i = 0; i < display_states.size(); ++i) {
     bool internal =
         display_states[i].display->type() == DISPLAY_CONNECTION_TYPE_INTERNAL;
     bool on =
+        display_states[i].display->type() == DISPLAY_CONNECTION_TYPE_VIRTUAL ||
         state == chromeos::DISPLAY_POWER_ALL_ON ||
         (state == chromeos::DISPLAY_POWER_INTERNAL_OFF_EXTERNAL_ON &&
          !internal) ||
         (state == chromeos::DISPLAY_POWER_INTERNAL_ON_EXTERNAL_OFF && internal);
     if (display_power)
       (*display_power)[i] = on;
     if (on)
       num_on_displays++;
   }
   return num_on_displays;
 }
 
+bool IsNativeDisplay(ui::DisplayConnectionType type) {
+  return !(type &
+           (DISPLAY_CONNECTION_TYPE_NETWORK | DISPLAY_CONNECTION_TYPE_VIRTUAL));
+}
+
 }  // namespace ui