Fix regression where no IMEs appear in the opt-in IME menu

ash/common/system/chromeos/ime_menu/ime_list_view.cc

Index: ash/common/system/chromeos/ime_menu/ime_list_view.cc
diff --git a/ash/common/system/chromeos/ime_menu/ime_list_view.cc b/ash/common/system/chromeos/ime_menu/ime_list_view.cc
index c038ebeb401b6c465f3337b44dda06427e24f432..670f4f9602ef4e8a09baee5311f672b7f5b4a388 100644
--- a/ash/common/system/chromeos/ime_menu/ime_list_view.cc
+++ b/ash/common/system/chromeos/ime_menu/ime_list_view.cc
@@ -227,13 +227,16 @@ class MaterialKeyboardStatusRowView : public views::View {
   DISALLOW_COPY_AND_ASSIGN(MaterialKeyboardStatusRowView);
 };
 
-ImeListView::ImeListView(SystemTrayItem* owner,
-                         bool show_keyboard_toggle,
-                         SingleImeBehavior single_ime_behavior)
+ImeListView::ImeListView(SystemTrayItem* owner)
     : TrayDetailsView(owner),
       last_item_selected_with_keyboard_(false),
       should_focus_ime_after_selection_with_keyboard_(false),
-      current_ime_view_(nullptr) {
+      current_ime_view_(nullptr) {}
+
+ImeListView::~ImeListView() {}
+
+void ImeListView::Init(bool show_keyboard_toggle,
+                       SingleImeBehavior single_ime_behavior) {
   SystemTrayDelegate* delegate = WmShell::Get()->system_tray_delegate();
   IMEInfoList list;
   delegate->GetAvailableIMEList(&list);
@@ -242,8 +245,6 @@ ImeListView::ImeListView(SystemTrayItem* owner,
   Update(list, property_list, show_keyboard_toggle, single_ime_behavior);
 }
 
-ImeListView::~ImeListView() {}
-
 void ImeListView::Update(const IMEInfoList& list,
                          const IMEPropertyInfoList& property_list,
                          bool show_keyboard_toggle,