monitor_reconfig: Disable external output to avoid error.

monitor_reconfigure_main.h

 // Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MONITOR_RECONFIGURE_MONITOR_RECONFIGURE_MAIN_H_
 #define MONITOR_RECONFIGURE_MONITOR_RECONFIGURE_MAIN_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 21 matching lines @@
   void DetermineOutputs();
 
   // Returns whether an external monitor is connected
   bool IsExternalMonitorConnected();
 
   // Sorts |output_info|'s modes by decreasing number of pixels, storing the
   // results in |modes_out|.
   void SortModesByResolution(const XRROutputInfo& output_info,
                              std::vector<ResolutionSelector::Mode>* modes_out);
 
-  // Set the resolution for a particular display or for the screen.
+  // Set the resolution for a particular device or for the screen.
   bool SetDeviceResolution(const std::string& device_name,
                            const std::string& resolution);
   bool SetScreenResolution(const std::string& resolution);
 
+  // Disable output to a device.
+  bool DisableDevice(const std::string& device_name);
+
   // Mapping between mode XIDs and mode information structures.
   std::map<int, XRRModeInfo*> mode_map_;
 
   // X Resources needed between functions
   Display* display_;
   XRRScreenResources* screen_info_;
   XRROutputInfo* lcd_output_;
   XRROutputInfo* external_output_;
 };
 
 }  // namespace monitor_reconfig
 
 #endif  // MONITOR_RECONFIGURE_MONITOR_RECONFIGURE_MAIN_H_