<webview>: Cleanup WebRequest event listeners when embedder destroyed

chrome/browser/guestview/webview/webview_guest.h

 // Copyright 2013 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_GUESTVIEW_WEBVIEW_WEBVIEW_GUEST_H_
 #define CHROME_BROWSER_GUESTVIEW_WEBVIEW_WEBVIEW_GUEST_H_
 
 #include "base/observer_list.h"
 #include "chrome/browser/extensions/tab_helper.h"
 #include "chrome/browser/guestview/guestview.h"
@@ skipping 26 matching lines @@
   virtual GuestView::Type GetViewType() const OVERRIDE;
   virtual WebViewGuest* AsWebView() OVERRIDE;
   virtual AdViewGuest* AsAdView() OVERRIDE;
 
   // GuestDelegate implementation.
   virtual void AddMessageToConsole(int32 level,
                                    const string16& message,
                                    int32 line_no,
                                    const string16& source_id) OVERRIDE;
   virtual void Close() OVERRIDE;
+  virtual void EmbedderDestroyed() OVERRIDE;
   virtual void GuestProcessGone(base::TerminationStatus status) OVERRIDE;
   virtual bool HandleKeyboardEvent(
       const content::NativeWebKeyboardEvent& event) OVERRIDE;
   virtual void LoadAbort(bool is_top_level,
                          const GURL& url,
                          const std::string& error_type) OVERRIDE;
   virtual void RendererResponsive() OVERRIDE;
   virtual void RendererUnresponsive() OVERRIDE;
   virtual bool RequestPermission(
       BrowserPluginPermissionType permission_type,
@@ skipping 92 matching lines @@
   int next_permission_request_id_;
 
   // A map to store the callback for a request keyed by the request's id.
   typedef std::map<int, PermissionResponseCallback> RequestMap;
   RequestMap pending_permission_requests_;
 
   DISALLOW_COPY_AND_ASSIGN(WebViewGuest);
 };
 
 #endif  // CHROME_BROWSER_GUESTVIEW_WEBVIEW_WEBVIEW_GUEST_H_