React to primary display change instead of removal

chrome/browser/chromeos/login/ui/login_display_host_impl.cc

Index: chrome/browser/chromeos/login/ui/login_display_host_impl.cc
diff --git a/chrome/browser/chromeos/login/ui/login_display_host_impl.cc b/chrome/browser/chromeos/login/ui/login_display_host_impl.cc
index a498e861c9d909c276d7263028ab47c2232d2eb3..fd221dddf564cbe819704d9cf3197451379db026 100644
--- a/chrome/browser/chromeos/login/ui/login_display_host_impl.cc
+++ b/chrome/browser/chromeos/login/ui/login_display_host_impl.cc
@@ -981,10 +981,7 @@ void LoginDisplayHostImpl::OnDisplayAdded(const display::Display& new_display) {
 }
 
 void LoginDisplayHostImpl::OnDisplayRemoved(
-    const display::Display& old_display) {
-  if (GetOobeUI())
-    GetOobeUI()->OnDisplayConfigurationChanged();
-}
+    const display::Display& old_display) {}

[oshima, 2017/05/17 16:56:18]

you can remove this

 
 void LoginDisplayHostImpl::OnDisplayMetricsChanged(
     const display::Display& display,
@@ -1000,6 +997,9 @@ void LoginDisplayHostImpl::OnDisplayMetricsChanged(
     const gfx::Size& size = primary_display.size();
     GetOobeUI()->GetCoreOobeView()->SetClientAreaSize(size.width(),
                                                       size.height());
+
+    if (changed_metrics & DISPLAY_METRIC_PRIMARY)
+      GetOobeUI()->OnDisplayConfigurationChanged();
   }
 }