[Sheriff] Revert "Revert "Revert 266297 "1. Handle the case of empty embedder_extension_id..."""

chrome/browser/guest_view/web_view/plugin_permission_helper.h

-// 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 CHROME_BROWSER_GUEST_VIEW_WEB_VIEW_PLUGIN_PERMISSION_HELPER_H_
-#define CHROME_BROWSER_GUEST_VIEW_WEB_VIEW_PLUGIN_PERMISSION_HELPER_H_
-
-#include "base/memory/weak_ptr.h"
-#include "content/public/browser/web_contents_observer.h"
-#include "content/public/browser/web_contents_user_data.h"
-
-class PluginPermissionHelper
-    : public content::WebContentsUserData<PluginPermissionHelper>,
-      public content::WebContentsObserver {
- public:
-  virtual ~PluginPermissionHelper();
-
- private:
-  explicit PluginPermissionHelper(content::WebContents* web_contents);
-  friend class content::WebContentsUserData<PluginPermissionHelper>;
-
-  // content::WebContentsObserver implementation.
-  virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
-
-  // Message handlers:
-  void OnBlockedUnauthorizedPlugin(const base::string16& name,
-                                   const std::string& identifier);
-  void OnCouldNotLoadPlugin(const base::FilePath& plugin_path);
-  void OnBlockedOutdatedPlugin(int placeholder_id,
-                               const std::string& identifier);
-  void OnNPAPINotSupported(const std::string& identifier);
-  void OnOpenAboutPlugins();
-#if defined(ENABLE_PLUGIN_INSTALLATION)
-  void OnFindMissingPlugin(int placeholder_id, const std::string& mime_type);
-
-  void OnRemovePluginPlaceholderHost(int placeholder_id);
-#endif
-
-  void OnPermissionResponse(const std::string& identifier,
-                            bool allow,
-                            const std::string& user_input);
-
-  base::WeakPtrFactory<PluginPermissionHelper> weak_factory_;
-
-  DISALLOW_COPY_AND_ASSIGN(PluginPermissionHelper);
-};
-
-#endif  // CHROME_BROWSER_GUEST_VIEW_WEB_VIEW_PLUGIN_PERMISSION_HELPER_H_