Use the wrench menu as a reference view for overflowed extension actions' popups

chrome/browser/ui/views/extensions/extension_action_view_delegate.h

Index: chrome/browser/ui/views/extensions/extension_action_view_delegate.h
diff --git a/chrome/browser/ui/views/extensions/extension_action_view_delegate.h b/chrome/browser/ui/views/extensions/extension_action_view_delegate.h
index 5a86e68d88c65491b649f4e3110ce493896a49ac..ca74a0621d4abe71a6a1b6038c218daca3e08b1b 100644
--- a/chrome/browser/ui/views/extensions/extension_action_view_delegate.h
+++ b/chrome/browser/ui/views/extensions/extension_action_view_delegate.h
@@ -15,6 +15,8 @@ class View;
 class Widget;
 }
 
+class ExtensionActionViewController;
+
 // The view that surrounds an ExtensionAction and owns the
 // ExtensionActionViewController. Since different actions can subclass
 // different views, we don't derive views::View directly here.
@@ -33,6 +35,11 @@ class ExtensionActionViewDelegate {
   // Returns the parent for the associated context menu.
   virtual views::Widget* GetParentForContextMenu() = 0;
 
+  // In some cases (such as when an action is shown in a menu), a substitute
+  // ExtensionActionViewController should be used for showing popups. This
+  // returns the preferred control.
+  virtual ExtensionActionViewController* GetPreferredPopupViewController() = 0;
+
   // Returns the reference view for the extension action's popup.
   virtual views::View* GetReferenceViewForPopup() = 0;