Provides more types of errors for output status.

chromeos/display/output_configurator.cc

Index: chromeos/display/output_configurator.cc
diff --git a/chromeos/display/output_configurator.cc b/chromeos/display/output_configurator.cc
index 8bb89bfc6bb2f27b94483e94f262138f4880c872..86d0262d4d8afd5efc4c2c215cbb620e641cee39 100644
--- a/chromeos/display/output_configurator.cc
+++ b/chromeos/display/output_configurator.cc
@@ -649,10 +649,12 @@ bool OutputConfigurator::CycleDisplayMode() {
   XRRFreeScreenResources(screen);
   XUngrabServer(display);
 
-  if (did_change)
+  if (did_change) {
     NotifyOnDisplayChanged();
-  else
-    FOR_EACH_OBSERVER(Observer, observers_, OnDisplayModeChangeFailed());
+  } else {
+    FOR_EACH_OBSERVER(
+        Observer, observers_, OnDisplayModeChangeFailed(next_state));
+  }
   return did_change;
 }
 
@@ -754,10 +756,12 @@ bool OutputConfigurator::SetDisplayMode(OutputState new_state) {
   XRRFreeScreenResources(screen);
   XUngrabServer(display);
 
-  if (output_state_ == new_state)
+  if (output_state_ == new_state) {
     NotifyOnDisplayChanged();
-  else
-    FOR_EACH_OBSERVER(Observer, observers_, OnDisplayModeChangeFailed());
+  } else {
+    FOR_EACH_OBSERVER(
+        Observer, observers_, OnDisplayModeChangeFailed(new_state));
+  }
   return true;
 }
 
@@ -828,6 +832,9 @@ void OutputConfigurator::ConfigureOutputs() {
   if (success) {
     output_state_ = new_state;
     NotifyOnDisplayChanged();
+  } else {
+    FOR_EACH_OBSERVER(
+        Observer, observers_, OnDisplayModeChangeFailed(new_state));
   }
   chromeos::DBusThreadManager::Get()->GetPowerManagerClient()->
       SetIsProjecting(is_projecting);