text: // Copyright 2014 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 EXTENSIONS_SHELL_BROWSER_SHELL_EXTENSION_WEB_CONTENTS_OBSERVER_H_
  #define EXTENSIONS_SHELL_BROWSER_SHELL_EXTENSION_WEB_CONTENTS_OBSERVER_H_
  
  #include "base/macros.h"
  #include "content/public/browser/web_contents_user_data.h"
  #include "extensions/browser/extension_web_contents_observer.h"
  
  namespace extensions {
  
  // The app_shell version of ExtensionWebContentsObserver.
  class ShellExtensionWebContentsObserver
      : public ExtensionWebContentsObserver,
        public content::WebContentsUserData<ShellExtensionWebContentsObserver> {
   public:
    ~ShellExtensionWebContentsObserver() override;
  
    // Creates and initializes an instance of this class for the given
    // |web_contents|, if it doesn't already exist.
    static void CreateForWebContents(content::WebContents* web_contents);
  
   private:
    friend class content::WebContentsUserData<ShellExtensionWebContentsObserver>;
  
    explicit ShellExtensionWebContentsObserver(
        content::WebContents* web_contents);
  
    DISALLOW_COPY_AND_ASSIGN(ShellExtensionWebContentsObserver);
  };
  
  }  // namespace extensions
  
  #endif  // EXTENSIONS_SHELL_BROWSER_SHELL_EXTENSION_WEB_CONTENTS_OBSERVER_H_
  