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

ui/views/focus/focus_manager_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/views/focus/focus_manager.h"
 
 #include <utility>
 #include <vector>
 
 #include "base/command_line.h"
@@ skipping 508 matching lines @@
 
    private:
     DtorTrackVector* dtor_tracker_;
     DISALLOW_COPY_AND_ASSIGN(TestFocusManagerFactory);
   };
 
   class LabelButtonDtorTracked : public LabelButton {
    public:
     LabelButtonDtorTracked(const base::string16& text,
                            DtorTrackVector* dtor_tracker)
-        : LabelButton(NULL, text),
-          dtor_tracker_(dtor_tracker) {
-      SetStyle(STYLE_BUTTON);
+        : LabelButton(nullptr), dtor_tracker_(dtor_tracker) {
+      InitAsButton(text);
     };
     ~LabelButtonDtorTracked() override {
       dtor_tracker_->push_back("LabelButtonDtorTracked");
     }
 
     DtorTrackVector* dtor_tracker_;
   };
 
   class WindowDtorTracked : public Widget {
    public:
@@ skipping 329 matching lines @@
   EXPECT_EQ(view1, GetFocusManager()->GetFocusedView());
 
   // Allow focus to go to the parent, and focus backwards which should now move
   // up |widget_view| (in the parent).
   delegate->set_should_advance_focus_to_parent(true);
   GetFocusManager()->AdvanceFocus(true);
   EXPECT_EQ(widget_view, GetFocusManager()->GetFocusedView());
 }
 
 }  // namespace views