[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 116 matching lines @@
   // to reset this, and the user triggers a call to ShowBubble() while the
   // window is hidden but not destroyed, GetWidget()->Close() would be
   // called twice.
   DCHECK_EQ(this, home_page_undo_bubble_);
   home_page_undo_bubble_ = NULL;
 }
 
 }  // namespace
 
 
-// HomeImageButton -----------------------------------------------------------
+// HomeButton -----------------------------------------------------------
 
-HomeImageButton::HomeImageButton(
+HomeButton::HomeButton(
     views::ButtonListener* listener,
     Browser* browser)
-    : views::ImageButton(listener),
+    : ToolbarButton(listener, NULL),
       browser_(browser) {
 }
 
-HomeImageButton::~HomeImageButton() {
+HomeButton::~HomeButton() {
 }
 
-bool HomeImageButton::GetDropFormats(
+bool HomeButton::GetDropFormats(
     int* formats,
     std::set<OSExchangeData::CustomFormat>* custom_formats) {
   *formats = ui::OSExchangeData::URL;
   return true;
 }
 
-bool HomeImageButton::CanDrop(const OSExchangeData& data) {
+bool HomeButton::CanDrop(const OSExchangeData& data) {
   return data.HasURL();
 }
 
-int HomeImageButton::OnDragUpdated(const ui::DropTargetEvent& event) {
+int HomeButton::OnDragUpdated(const ui::DropTargetEvent& event) {
   return (event.source_operations() & ui::DragDropTypes::DRAG_LINK) ?
       ui::DragDropTypes::DRAG_LINK : ui::DragDropTypes::DRAG_NONE;
 }
 
-int HomeImageButton::OnPerformDrop(const ui::DropTargetEvent& event) {
+int HomeButton::OnPerformDrop(const ui::DropTargetEvent& event) {
   GURL new_homepage_url;
   string16 title;
   if (event.data().GetURLAndTitle(&new_homepage_url, &title) &&
       new_homepage_url.is_valid()) {
     PrefService* prefs = browser_->profile()->GetPrefs();
     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;
 }