Start in extended desktop mode if it is enabled.

chromeos/display/output_configurator.h

Index: chromeos/display/output_configurator.h
diff --git a/chromeos/display/output_configurator.h b/chromeos/display/output_configurator.h
index 70adcfb647ff390f172c7fd7751f30cb074e999f..b1518dbf641f494a86248af89a2314491cdb908c 100644
--- a/chromeos/display/output_configurator.h
+++ b/chromeos/display/output_configurator.h
@@ -40,7 +40,7 @@ enum OutputState {
 // it.
 class CHROMEOS_EXPORT OutputConfigurator : public MessageLoop::Dispatcher {
  public:
-  OutputConfigurator();
+  explicit OutputConfigurator(bool is_extended_display_enabled);
   virtual ~OutputConfigurator();
 
   OutputState output_state() const { return output_state_; }
@@ -48,7 +48,7 @@ class CHROMEOS_EXPORT OutputConfigurator : public MessageLoop::Dispatcher {
   // Called when the user hits ctrl-F4 to request a display mode change.
   // This method should only return false if it was called in a single-head or
   // headless mode.
-  bool CycleDisplayMode(bool extended_desktop_enabled);
+  bool CycleDisplayMode();
 
   // Called when powerd notifies us that some set of displays should be turned
   // on or off.  This requires enabling or disabling the CRTC associated with
@@ -131,6 +131,9 @@ class CHROMEOS_EXPORT OutputConfigurator : public MessageLoop::Dispatcher {
   // configuration to immediately fail without changing the state.
   bool is_running_on_chrome_os_;
 
+  // Set to true if the extended display flag is enabled.
+  const bool is_extended_display_enabled_;
+
   // The number of outputs in the output_cache_ array.
   int output_count_;