Make javascript dialogs into top-level windows.

ui/views/widget/desktop_aura/desktop_native_widget_aura.cc

Index: ui/views/widget/desktop_aura/desktop_native_widget_aura.cc
diff --git a/ui/views/widget/desktop_aura/desktop_native_widget_aura.cc b/ui/views/widget/desktop_aura/desktop_native_widget_aura.cc
index 39b862ec9b2d1ce5b6aa8ad5e6af324ad8850cbb..ac557f016441dda88d971cfa6fe7463ec45420e7 100644
--- a/ui/views/widget/desktop_aura/desktop_native_widget_aura.cc
+++ b/ui/views/widget/desktop_aura/desktop_native_widget_aura.cc
@@ -545,7 +545,11 @@ void DesktopNativeWidgetAura::SetCursor(gfx::NativeCursor cursor) {
 
 void DesktopNativeWidgetAura::ClearNativeFocus() {
   desktop_root_window_host_->ClearNativeFocus();
-  aura::client::GetFocusClient(window_)->ResetFocusWithinActiveWindow(window_);
+
+  if (ShouldActivate()) {
+    aura::client::GetFocusClient(window_)->
+        ResetFocusWithinActiveWindow(window_);
+  }
 }
 
 gfx::Rect DesktopNativeWidgetAura::GetWorkAreaBoundsInScreen() const {