Allow the user to drag an extension to the overflow menu, even when its empty

chrome/browser/ui/views/toolbar/browser_actions_container.h

 // Copyright 2013 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_TOOLBAR_BROWSER_ACTIONS_CONTAINER_H_
 #define CHROME_BROWSER_UI_VIEWS_TOOLBAR_BROWSER_ACTIONS_CONTAINER_H_
 
 #include "base/observer_list.h"
 #include "chrome/browser/extensions/extension_keybinding_registry.h"
 #include "chrome/browser/extensions/extension_toolbar_model.h"
@@ skipping 331 matching lines @@
 
   // Animate to the target size (unless testing, in which case we go straight to
   // the target size).
   void Animate(gfx::Tween::Type type, size_t num_visible_icons);
 
   // Returns true if this extension should be shown in this toolbar. This can
   // return false if we are in an incognito window and the extension is disabled
   // for incognito.
   bool ShouldDisplayBrowserAction(const extensions::Extension* extension) const;
 
-  // Return the index of the first visible icon.
-  size_t GetFirstVisibleIconIndex() const;
-
   // Returns the number of icons that this container should draw. This differs
   // from the model's GetVisibleIconCount if this container is for the overflow.
   size_t GetIconCount() const;
 
   // Whether this container is in overflow mode (as opposed to in 'main'
   // mode). See class comments for details on the difference.
   bool in_overflow_mode() const { return main_container_ != NULL; }
 
   // Whether or not the container has been initialized.
   bool initialized_;
@@ skipping 68 matching lines @@
   ObserverList<BrowserActionsContainerObserver> observers_;
 
   // The maximum number of icons to show per row when in overflow mode (showing
   // icons in the application menu).
   static int icons_per_overflow_menu_row_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserActionsContainer);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_TOOLBAR_BROWSER_ACTIONS_CONTAINER_H_