Panels back behind a flag.

chrome/browser/ui/panels/panel_manager.cc

Index: chrome/browser/ui/panels/panel_manager.cc
diff --git a/chrome/browser/ui/panels/panel_manager.cc b/chrome/browser/ui/panels/panel_manager.cc
index ea53bfce947407ef2ee33396e676231017d72206..6120c3971786885a564e71e974bac9001f51508a 100644
--- a/chrome/browser/ui/panels/panel_manager.cc
+++ b/chrome/browser/ui/panels/panel_manager.cc
@@ -4,6 +4,7 @@
 
 #include "chrome/browser/ui/panels/panel_manager.h"
 
+#include "base/command_line.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "chrome/browser/fullscreen.h"
@@ -13,6 +14,8 @@
 #include "chrome/browser/ui/panels/panel_overflow_strip.h"
 #include "chrome/browser/ui/panels/panel_strip.h"
 #include "chrome/common/chrome_notification_types.h"
+#include "chrome/common/chrome_switches.h"
+#include "chrome/common/chrome_version_info.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/notification_source.h"
 #include "ui/gfx/screen.h"
@@ -37,6 +40,22 @@ PanelManager* PanelManager::GetInstance() {
   return instance.Pointer();
 }
 
+// static
+bool PanelManager::ShouldUsePanels(const std::string& extension_id) {
+  chrome::VersionInfo::Channel channel = chrome::VersionInfo::GetChannel();
+  if (channel == chrome::VersionInfo::CHANNEL_STABLE ||
+      channel == chrome::VersionInfo::CHANNEL_BETA) {
+    return CommandLine::ForCurrentProcess()->HasSwitch(
+        switches::kEnablePanels) ||
+        extension_id == std::string("nckgahadagoaajjgafhacjanaoiihapd") ||
+        extension_id == std::string("ljclpkphhpbpinifbeabbhlfddcpfdde") ||
+        extension_id == std::string("ppleadejekpmccmnpjdimmlfljlkdfej") ||
+        extension_id == std::string("eggnbpckecmjlblplehfpjjdhhidfdoj");
+  }
+
+  return true;
+}
+
 PanelManager::PanelManager()
     : panel_mouse_watcher_(PanelMouseWatcher::Create()),
       auto_sizing_enabled_(true),