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

ui/views/focus/focus_manager.cc

Index: ui/views/focus/focus_manager.cc
diff --git a/ui/views/focus/focus_manager.cc b/ui/views/focus/focus_manager.cc
index 4aa36ad4d6ba60f0ea2510d49249857813869f24..4808b4422cb1157310a4306bb74eb6c950fe1462 100644
--- a/ui/views/focus/focus_manager.cc
+++ b/ui/views/focus/focus_manager.cc
@@ -314,8 +314,13 @@ View* FocusManager::GetNextFocusableView(View* original_starting_view,
 
 void FocusManager::SetFocusedViewWithReason(
     View* view, FocusChangeReason reason) {
-  if (focused_view_ == view)
+  if (focused_view_ == view) {
+    // In the case that the widget lost the focus and gained it back without
+    // changing the focused view, we have to make the text input client focused.
+    // TODO(yukishiino): Remove this hack once we fix http://crbug.com/383236
+    FocusTextInputClient(focused_view_);
     return;
+  }
 
   base::AutoReset<bool> auto_changing_focus(&is_changing_focus_, true);
   // Update the reason for the focus change (since this is checked by