Extension/Platform App window isolation

chrome/browser/extensions/browser_extension_window_controller.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_BROWSER_EXTENSION_WINDOW_CONTROLLER_H_
 #define CHROME_BROWSER_EXTENSIONS_BROWSER_EXTENSION_WINDOW_CONTROLLER_H_
 #pragma once
 
 #include "chrome/browser/extensions/extension_window_controller.h"
 
 class Browser;
 
 class BrowserExtensionWindowController : public ExtensionWindowController {
  public:
   explicit BrowserExtensionWindowController(Browser* browser);
 
   // ExtensionWindowController implementation.
   virtual int GetWindowId() const OVERRIDE;
   virtual std::string GetWindowTypeText() const OVERRIDE;
   virtual base::DictionaryValue* CreateWindowValue() const OVERRIDE;
   virtual base::DictionaryValue* CreateWindowValueWithTabs() const OVERRIDE;
   virtual bool CanClose(Reason* reason) const OVERRIDE;
   virtual void SetFullscreenMode(bool is_fullscreen,
                                  const GURL& extension_url) const OVERRIDE;
   virtual Browser* GetBrowser() const OVERRIDE;
 
+ protected:
+  // Extension/window visibility and ownership is window-specific, subclasses
+  // need to define this behavior.
+  virtual bool IsVisibleToExtension(const Extension* extension) const OVERRIDE;
+
  private:
   Browser* browser_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserExtensionWindowController);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_BROWSER_EXTENSION_WINDOW_CONTROLLER_H_