CustomButton cleanup: make protected members private, create accessors

ui/app_list/views/search_box_view.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/app_list/views/search_box_view.h"
 
 #include <algorithm>
 
 #include "ui/app_list/app_list_constants.h"
 #include "ui/app_list/app_list_model.h"
@@ skipping 85 matching lines @@
     // state.
     if (event.key_code() == ui::VKEY_SPACE)
       return false;
 
     return CustomButton::OnKeyPressed(event);
   }
 
  private:
   // views::View overrides:
   void OnPaintBackground(gfx::Canvas* canvas) override {
-    if (state_ == STATE_HOVERED || state_ == STATE_PRESSED || selected_)
+    if (state() == STATE_HOVERED || state() == STATE_PRESSED || selected_)
       canvas->FillRect(gfx::Rect(size()), kSelectedColor);
   }
 
   bool selected_;
 
   DISALLOW_COPY_AND_ASSIGN(SearchBoxImageButton);
 };
 
 SearchBoxView::SearchBoxView(SearchBoxViewDelegate* delegate,
                              AppListViewDelegate* view_delegate)
@@ skipping 345 matching lines @@
   NotifyQueryChanged();
 }
 
 void SearchBoxView::OnSpeechRecognitionStateChanged(
     SpeechRecognitionState new_state) {
   SpeechRecognitionButtonPropChanged();
   SchedulePaint();
 }
 
 }  // namespace app_list