Revert of Show the Cast toolbar icon ephemerally when Cast is in use

chrome/browser/ui/toolbar/toolbar_actions_model.h

 // Copyright (c) 2012 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_TOOLBAR_TOOLBAR_ACTIONS_MODEL_H_
 #define CHROME_BROWSER_UI_TOOLBAR_TOOLBAR_ACTIONS_MODEL_H_
 
 #include <stddef.h>
 
 #include "base/compiler_specific.h"
@@ skipping 240 matching lines @@
   bool ShouldAddExtension(const extensions::Extension* extension);
 
   // Adds or removes the given |extension| from the toolbar model.
   void AddExtension(const extensions::Extension* extension);
   void RemoveExtension(const extensions::Extension* extension);
 
   // Returns true if |item| is in the toolbar model.
   bool HasItem(const ToolbarItem& item) const;
 
   // Adds |item| to the toolbar.  If the item has an existing preference for
-  // toolbar position, that will be used to determine its location. Otherwise
-  // it will be placed at the end of the visible items. If the toolbar is in
-  // highlighting mode, the item will not be visible until highlighting mode is
-  // exited.
-  void AddItem(const ToolbarItem& item);
+  // toolbar position, that will be used to determine its location.  If
+  // |is_component| is true, the item will be given a default postion of 0,
+  // otherwise the default is at the end of the visible items. If the toolbar is
+  // in highlighting mode, the item will not be visible until highlighting mode
+  // is exited.
+  void AddItem(const ToolbarItem& item, bool is_component);
 
   // Removes |item| from the toolbar.  If the toolbar is in highlighting mode,
   // the item is also removed from the highlighted list (if present).
   void RemoveItem(const ToolbarItem& item);
 
   // Looks up and returns the extension with the given |id| in the set of
   // enabled extensions.
   const extensions::Extension* GetExtensionById(const std::string& id) const;
 
   // Our observers.
@@ skipping 61 matching lines @@
   // For observing change of toolbar order preference by external entity (sync).
   PrefChangeRegistrar pref_change_registrar_;
   base::Closure pref_change_callback_;
 
   base::WeakPtrFactory<ToolbarActionsModel> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ToolbarActionsModel);
 };
 
 #endif  // CHROME_BROWSER_UI_TOOLBAR_TOOLBAR_ACTIONS_MODEL_H_