[Toolbar] Base toolbar button class with background images for button states

chrome/browser/ui/views/toolbar/home_button.cc

 // Copyright 2013 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 "chrome/browser/ui/views/toolbar/home_button.h"
 
 #include "base/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/common/pref_names.h"
@@ skipping 121 matching lines @@
 }
 
 }  // namespace
 
 
 // HomeImageButton -----------------------------------------------------------
 
 HomeImageButton::HomeImageButton(
     views::ButtonListener* listener,
     Browser* browser)
-    : views::ImageButton(listener),
+    : ToolbarButton(listener, NULL),
       browser_(browser) {
 }
 
 HomeImageButton::~HomeImageButton() {
 }
 
 bool HomeImageButton::GetDropFormats(
     int* formats,
     std::set<OSExchangeData::CustomFormat>* custom_formats) {
   *formats = ui::OSExchangeData::URL;
@@ skipping 18 matching lines @@
     bool old_is_ntp = prefs->GetBoolean(prefs::kHomePageIsNewTabPage);
     GURL old_homepage(prefs->GetString(prefs::kHomePage));
 
     prefs->SetBoolean(prefs::kHomePageIsNewTabPage, false);
     prefs->SetString(prefs::kHomePage, new_homepage_url.spec());
 
     HomePageUndoBubble::ShowBubble(browser_, old_is_ntp, old_homepage, this);
   }
   return ui::DragDropTypes::DRAG_NONE;
 }