[Panel refactor] Deprecate old panels.

chrome/browser/extensions/api/tabs/tabs.cc

Index: chrome/browser/extensions/api/tabs/tabs.cc
diff --git a/chrome/browser/extensions/api/tabs/tabs.cc b/chrome/browser/extensions/api/tabs/tabs.cc
index d93d3d9c948a5deb1c9805bb70f272d922583ac0..c168f4f30998e8f113766af2d7c5d0b087710a6e 100644
--- a/chrome/browser/extensions/api/tabs/tabs.cc
+++ b/chrome/browser/extensions/api/tabs/tabs.cc
@@ -577,8 +577,7 @@ bool CreateWindowFunction::RunImpl() {
   }
 
 #if !defined(USE_ASH)
-  if (window_type == Browser::TYPE_PANEL &&
-      PanelManager::UseBrowserlessPanels()) {
+  if (window_type == Browser::TYPE_PANEL) {
     std::string title =
         web_app::GenerateApplicationNameFromExtensionId(extension_id);
     // Note: Panels ignore all but the first url provided.
@@ -596,7 +595,6 @@ bool CreateWindowFunction::RunImpl() {
             GetExtension()));
     return true;
   }
-  // else fall through to create BrowserWindow
 #endif
 
   // Create a new BrowserWindow.