views::LabelButton should not call virtual methods from its constructor

ui/views/accessible_pane_view_unittest.cc

Index: ui/views/accessible_pane_view_unittest.cc
diff --git a/ui/views/accessible_pane_view_unittest.cc b/ui/views/accessible_pane_view_unittest.cc
index d53fb72f67db1d0e3513b3b11a5633e2f249bce5..10f5556377a5022f3b01280870629332db9d1509 100644
--- a/ui/views/accessible_pane_view_unittest.cc
+++ b/ui/views/accessible_pane_view_unittest.cc
@@ -35,6 +35,7 @@ class TestBarView : public AccessiblePaneView,
 
  private:
   void Init();
+  LabelButton* CreateButton(bool add);
 
   scoped_ptr<LabelButton> child_button_;
   scoped_ptr<LabelButton> second_child_button_;
@@ -56,14 +57,18 @@ void TestBarView::ButtonPressed(Button* sender, const ui::Event& event) {
 
 void TestBarView::Init() {
   SetLayoutManager(new FillLayout());
-  base::string16 label;
-  child_button_.reset(new LabelButton(this, label));
-  AddChildView(child_button_.get());
-  second_child_button_.reset(new LabelButton(this, label));
-  AddChildView(second_child_button_.get());
-  third_child_button_.reset(new LabelButton(this, label));
-  AddChildView(third_child_button_.get());
-  not_child_button_.reset(new LabelButton(this, label));
+  child_button_.reset(CreateButton(true));
+  second_child_button_.reset(CreateButton(true));
+  third_child_button_.reset(CreateButton(true));
+  not_child_button_.reset(CreateButton(false));
+}
+
+LabelButton* TestBarView::CreateButton(bool add) {
+  LabelButton* button = new LabelButton(this);
+  button->InitAsTextbutton(base::string16());
+  if (add)
+    AddChildView(button);
+  return button;
 }
 
 View* TestBarView::GetDefaultFocusableChild() {