Allow dynamic switching in and out of sidetabs mode.

chrome/browser/browser.cc

 // Copyright (c) 2010 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/browser.h"
 
 #include <algorithm>
 #include <string>
 
 #include "app/animation.h"
@@ skipping 172 matching lines @@
 
   // Need to know when to alert the user of theme install delay.
   registrar_.Add(this, NotificationType::EXTENSION_READY_FOR_INSTALL,
                  NotificationService::AllSources());
 
   InitCommandState();
   BrowserList::AddBrowser(this);
 
   encoding_auto_detect_.Init(prefs::kWebKitUsesUniversalDetector,
                              profile_->GetPrefs(), NULL);
+  use_vertical_tabs_.Init(prefs::kUseVerticalTabs, profile_->GetPrefs(), this);
 }
 
 Browser::~Browser() {
   // The tab strip should not have any significant tabs at this point.
   DCHECK(!tabstrip_model_.HasNonPhantomTabs());
   tabstrip_model_.RemoveObserver(this);
 
   BrowserList::RemoveBrowser(this);
 
 #if defined(OS_WIN) || defined(OS_LINUX)
@@ skipping 1311 matching lines @@
   prefs->RegisterBooleanPref(prefs::kDeleteFormData, true);
   prefs->RegisterIntegerPref(prefs::kDeleteTimePeriod, 0);
   prefs->RegisterBooleanPref(prefs::kCheckDefaultBrowser, true);
   prefs->RegisterBooleanPref(prefs::kShowOmniboxSearchHint, true);
   prefs->RegisterIntegerPref(prefs::kNTPPromoLineRemaining, 5);
   prefs->RegisterIntegerPref(prefs::kNTPPromoImageRemaining, 5);
   prefs->RegisterBooleanPref(prefs::kShowExtensionShelf, true);
   prefs->RegisterBooleanPref(prefs::kWebAppCreateOnDesktop, true);
   prefs->RegisterBooleanPref(prefs::kWebAppCreateInAppsMenu, true);
   prefs->RegisterBooleanPref(prefs::kWebAppCreateInQuickLaunchBar, true);
-  prefs->RegisterBooleanPref(prefs::kUseVerticalTabs, true);
+  prefs->RegisterBooleanPref(prefs::kUseVerticalTabs, false);
   prefs->RegisterBooleanPref(prefs::kEnableTranslate, true);
 }
 
 // static
 Browser* Browser::GetBrowserForController(
     const NavigationController* controller, int* index_result) {
   BrowserList::const_iterator it;
   for (it = BrowserList::begin(); it != BrowserList::end(); ++it) {
     int index = (*it)->tabstrip_model_.GetIndexOfController(controller);
     if (index != TabStripModel::kNoTab) {
@@ skipping 407 matching lines @@
   BookmarkEditor::EditDetails details;
   details.type = BookmarkEditor::EditDetails::NEW_FOLDER;
   bookmark_utils::GetURLsForOpenTabs(this, &(details.urls));
   DCHECK(!details.urls.empty());
 
   BookmarkEditor::Show(window()->GetNativeHandle(), profile_,
                        model->GetParentForNewNodes(),  details,
                        BookmarkEditor::SHOW_TREE, NULL);
 }
 
+bool Browser::UseVerticalTabs() const {
+  return use_vertical_tabs_.GetValue();
+}
+
+void Browser::ToggleUseVerticalTabs() {
+  use_vertical_tabs_.SetValue(!UseVerticalTabs());
+  window()->ToggleTabStripMode();
+}
+
 ///////////////////////////////////////////////////////////////////////////////
 // Browser, TabStripModelObserver implementation:
 
 void Browser::TabInsertedAt(TabContents* contents,
                             int index,
                             bool foreground) {
   contents->set_delegate(this);
   contents->controller().SetWindowID(session_id());
 
   SyncHistoryWithTabs(index);
@@ skipping 1440 matching lines @@
     return;
 
   ExtensionsService* extension_service = profile()->GetExtensionsService();
   if (extension_service && extension_service->is_ready()) {
     Extension* extension =
         extension_service->GetExtensionById(app_extension_id, false);
     if (extension)
       contents->SetAppExtension(extension);
   }
 }