[Extension Toolbar] Refactor and finish pop out logic for actions

chrome/browser/ui/toolbar/test_toolbar_actions_bar_helper.h

Index: chrome/browser/ui/toolbar/test_toolbar_actions_bar_helper.h
diff --git a/chrome/browser/ui/toolbar/test_toolbar_actions_bar_helper.h b/chrome/browser/ui/toolbar/test_toolbar_actions_bar_helper.h
index 91dee006156ef72bb164aff8c06a930aa990c5d1..7c9ce5dc8ec89ef8117a39b4dc4b7b246d44988b 100644
--- a/chrome/browser/ui/toolbar/test_toolbar_actions_bar_helper.h
+++ b/chrome/browser/ui/toolbar/test_toolbar_actions_bar_helper.h
@@ -18,7 +18,11 @@ class TestToolbarActionsBarHelper {
   TestToolbarActionsBarHelper() {}
   virtual ~TestToolbarActionsBarHelper() {}
 
-  static scoped_ptr<TestToolbarActionsBarHelper> Create(Browser* browser);
+  // Creates and returns a TestToolbarActionsBarHelper. If |main_bar| is
+  // non-null, the created actions bar will be in overflow mode.
+  static scoped_ptr<TestToolbarActionsBarHelper> Create(
+      Browser* browser,
+      TestToolbarActionsBarHelper* main_bar);
 
   virtual ToolbarActionsBar* GetToolbarActionsBar() = 0;