Make extensions that desire to act pop out if in overflow

chrome/browser/ui/views/toolbar/browser_action_view.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_ACTION_VIEW_H_
 #define CHROME_BROWSER_UI_VIEWS_TOOLBAR_BROWSER_ACTION_VIEW_H_
 
 #include "chrome/browser/ui/views/toolbar/toolbar_action_view_delegate.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
@@ skipping 24 matching lines @@
 class BrowserActionView : public views::MenuButton,
                           public ToolbarActionViewDelegate,
                           public views::ButtonListener,
                           public content::NotificationObserver {
  public:
   // Need DragController here because BrowserActionView could be
   // dragged/dropped.
   class Delegate : public views::DragController {
    public:
     // Returns the current web contents.
-    virtual content::WebContents* GetCurrentWebContents() = 0;
+    virtual content::WebContents* GetCurrentWebContents() const = 0;
 
     // Whether the container for this button is shown inside a menu.
     virtual bool ShownInsideMenu() const = 0;
 
     // Notifies that a drag completed. Note this will only happen if the view
     // wasn't removed during the drag-and-drop process (i.e., not when there
     // was a move in the browser actions, since we re-create the views each
     // time we re-order the browser actions).
     virtual void OnBrowserActionViewDragDone() = 0;
 
@@ skipping 101 matching lines @@
 
   // Used to make sure we only register the command once.
   bool called_register_command_;
 
   content::NotificationRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserActionView);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_TOOLBAR_BROWSER_ACTION_VIEW_H_