Make hiding an extension action cause it to go to the overflow menu

chrome/browser/extensions/extension_toolbar_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_EXTENSIONS_EXTENSION_TOOLBAR_MODEL_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_TOOLBAR_MODEL_H_
 
 #include "base/compiler_specific.h"
 #include "base/observer_list.h"
 #include "base/prefs/pref_change_registrar.h"
@@ skipping 163 matching lines @@
   // To be called after the extension service is ready; gets loaded extensions
   // from the extension service and their saved order from the pref service
   // and constructs |toolbar_items_| from these data.
   void InitializeExtensionList(const ExtensionSet& extensions);
   void Populate(const ExtensionIdList& positions,
                 const ExtensionSet& extensions);
 
   // Save the model to prefs.
   void UpdatePrefs();
 
+  // Updates |extension|'s browser action visibility pref if the browser action
+  // is in the overflow menu and should be considered hidden.
+  void MaybeUpdateVisibilityPref(const Extension* extension, int index);
+
+  // Calls MaybeUpdateVisibilityPref() for each extension in |toolbar_items|.
+  void MaybeUpdateVisibilityPrefs();
+
   // Finds the last known visible position of the icon for an |extension|. The
   // value returned is a zero-based index into the vector of visible items.
   size_t FindNewPositionFromLastKnownGood(const Extension* extension);
 
   // Returns true if the given |extension| should be added to the toolbar.
   bool ShouldAddExtension(const Extension* extension);
 
   // Adds or removes the given |extension| from the toolbar model.
   void AddExtension(const Extension* extension);
   void RemoveExtension(const Extension* extension);
@@ skipping 49 matching lines @@
   base::Closure pref_change_callback_;
 
   base::WeakPtrFactory<ExtensionToolbarModel> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionToolbarModel);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_TOOLBAR_MODEL_H_