[Panel refactor] use browserless Panels by default in Dev/Canary

chrome/browser/ui/panels/panel_manager.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 "chrome/browser/ui/panels/panel_manager.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 70 matching lines @@
         switches::kEnablePanels) ||
         extension_id == std::string("nckgahadagoaajjgafhacjanaoiihapd") ||
         extension_id == std::string("ljclpkphhpbpinifbeabbhlfddcpfdde") ||
         extension_id == std::string("ppleadejekpmccmnpjdimmlfljlkdfej") ||
         extension_id == std::string("eggnbpckecmjlblplehfpjjdhhidfdoj");
   }
 
   return true;
 }
 
+// static
+bool PanelManager::UseBrowserlessPanels() {
+  if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kOldPanels))
+    return false;
+
+  return chrome::VersionInfo::GetChannel() <= chrome::VersionInfo::CHANNEL_DEV;
+}
+
 PanelManager::PanelManager()
     : panel_mouse_watcher_(PanelMouseWatcher::Create()),
       auto_sizing_enabled_(true) {
   // DisplaySettingsProvider should be created before the creation of strips
   // since some strip might depend on it.
   display_settings_provider_.reset(DisplaySettingsProvider::Create());
   display_settings_provider_->AddDisplayAreaObserver(this);
 
   detached_strip_.reset(new DetachedPanelStrip(this));
   docked_strip_.reset(new DockedPanelStrip(this));
@@ skipping 247 matching lines @@
 void PanelManager::SetMouseWatcher(PanelMouseWatcher* watcher) {
   panel_mouse_watcher_.reset(watcher);
 }
 
 void PanelManager::OnPanelAnimationEnded(Panel* panel) {
   content::NotificationService::current()->Notify(
       chrome::NOTIFICATION_PANEL_BOUNDS_ANIMATIONS_FINISHED,
       content::Source<Panel>(panel),
       content::NotificationService::NoDetails());
 }