Implement RevokePermission() method in PermissionService.

content/public/browser/content_browser_client.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 CONTENT_PUBLIC_BROWSER_CONTENT_BROWSER_CLIENT_H_
 #define CONTENT_PUBLIC_BROWSER_CONTENT_BROWSER_CLIENT_H_
 
 #include <map>
 #include <string>
 #include <utility>
@@ skipping 427 matching lines @@
                                        WebContents* web_contents,
                                        const GURL& frame_url,
                                        const GURL& main_frame_url) {}
 
   virtual PermissionStatus GetPermissionStatus(
       PermissionType permission,
       BrowserContext* browser_context,
       const GURL& requesting_origin,
       const GURL& embedding_origin);
 
+  virtual PermissionStatus RevokePermission(
+      PermissionType permission,
+      BrowserContext* browser_context,
+      const GURL& requesting_origin,
+      const GURL& embedding_origin);
+
   // Returns true if the given page is allowed to open a window of the given
   // type. If true is returned, |no_javascript_access| will indicate whether
   // the window that is created should be scriptable/in the same process.
   // This is called on the IO thread.
   virtual bool CanCreateWindow(const GURL& opener_url,
                                const GURL& opener_top_level_frame_url,
                                const GURL& source_origin,
                                WindowContainerType container_type,
                                const GURL& target_url,
                                const Referrer& referrer,
@@ skipping 154 matching lines @@
   // Allows an embedder to provide its own ExternalVideoSurfaceContainer
   // implementation.  Return NULL to disable external surface video.
   virtual ExternalVideoSurfaceContainer*
   OverrideCreateExternalVideoSurfaceContainer(WebContents* web_contents);
 #endif
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_CONTENT_BROWSER_CLIENT_H_