aura: Updates the text input client when native activation changes.

ui/views/widget/widget.cc

Index: ui/views/widget/widget.cc
diff --git a/ui/views/widget/widget.cc b/ui/views/widget/widget.cc
index b2ce42f2f431ddd8cb5228d70934dac736e9f31d..892bef3ba633ae41449257072e2b05e1da574259 100644
--- a/ui/views/widget/widget.cc
+++ b/ui/views/widget/widget.cc
@@ -1031,6 +1031,16 @@ void Widget::OnNativeWidgetActivationChanged(bool active) {
   FOR_EACH_OBSERVER(WidgetObserver, observers_,
                     OnWidgetActivationChanged(this, active));
 
+  // We have to update the focused text input client when the active widget
+  // changes.  See crbug.com/377479
+  views::FocusManager* focus_manager = GetFocusManager();
+  if (focus_manager) {
+    if (active)
+      focus_manager->FocusTextInputClient(focus_manager->GetFocusedView());
+    else
+      focus_manager->BlurTextInputClient(focus_manager->GetFocusedView());
+  }
+
   if (IsVisible() && non_client_view())
     non_client_view()->frame_view()->SchedulePaint();
 }