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

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

 // Copyright 2014 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.
 
 #ifndef CHROME_BROWSER_UI_VIEWS_EXTENSIONS_EXTENSION_ACTION_VIEW_DELEGATE_H_
 #define CHROME_BROWSER_UI_VIEWS_EXTENSIONS_EXTENSION_ACTION_VIEW_DELEGATE_H_
 
 namespace content {
 class WebContents;
 }
 
 namespace views {
 class FocusManager;
 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.
 class ExtensionActionViewDelegate {
  public:
   // Returns |this| as a view. We need this because our subclasses implement
   // different kinds of views, and inheriting View here is a really bad idea.
   virtual views::View* GetAsView() = 0;
 
   // Returns true if this view is being shown inside a menu.
   virtual bool IsShownInMenu() = 0;
 
   // Returns the FocusManager to use when registering accelerators.
   virtual views::FocusManager* GetFocusManagerForAccelerator() = 0;
 
   // 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;
 
   // Returns the current web contents.
   virtual content::WebContents* GetCurrentWebContents() = 0;
 
   // Hides whatever popup is active (even if it's not this one).
   virtual void HideActivePopup() = 0;
 
   // Called when the icon is updated; this is forwarded from the icon factory.
@@ skipping 12 matching lines @@
   // Called once the context menu has closed.
   // This may not be called if the context menu is showing and |this| is
   // deleted.
   virtual void OnContextMenuDone() {}
 
  protected:
   virtual ~ExtensionActionViewDelegate() {}
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_EXTENSIONS_EXTENSION_ACTION_VIEW_DELEGATE_H_