Index: ash/display/window_tree_host_manager.cc |
diff --git a/ash/display/window_tree_host_manager.cc b/ash/display/window_tree_host_manager.cc |
index fc1ee59bb3729df7de561d06caed0dc91ba4a334..cdbe6538a83a2f04d3f1d3e21521efb8c9e4f6ab 100644 |
--- a/ash/display/window_tree_host_manager.cc |
+++ b/ash/display/window_tree_host_manager.cc |
@@ -584,7 +584,8 @@ void WindowTreeHostManager::OnDisplayAdded(const display::Display& display) { |
ash_host->AsWindowTreeHost()->window(), false); |
Shell::GetInstance() |
->partial_magnification_controller() |
- ->SwitchTargetRootWindow(ash_host->AsWindowTreeHost()->window()); |
+ ->SwitchTargetRootWindowIfNeeded( |
+ ash_host->AsWindowTreeHost()->window()); |
AshWindowTreeHost* to_delete = primary_tree_host_for_replace_; |
primary_tree_host_for_replace_ = nullptr; |