Implement unregisterProtocolHandler()

content/public/browser/web_contents_delegate.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_WEB_CONTENTS_DELEGATE_H_
 #define CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_DELEGATE_H_
 
 #include <set>
 #include <string>
 
@@ skipping 365 matching lines @@
       const WebContents* web_contents) const;
 
   // Register a new handler for URL requests with the given scheme.
   // |user_gesture| is true if the registration is made in the context of a user
   // gesture.
   virtual void RegisterProtocolHandler(WebContents* web_contents,
                                        const std::string& protocol,
                                        const GURL& url,
                                        bool user_gesture) {}
 
+  // Unregister the registered handler for URL requests with the given scheme.
+  // |user_gesture| is true if the registration is made in the context of a user
+  // gesture.
+  virtual void UnregisterProtocolHandler(WebContents* web_contents,
+                                         const std::string& protocol,
+                                         const GURL& url,
+                                         bool user_gesture) {}
+
   // Result of string search in the page. This includes the number of matches
   // found and the selection rect (in screen coordinates) for the string found.
   // If |final_update| is false, it indicates that more results follow.
   virtual void FindReply(WebContents* web_contents,
                          int request_id,
                          int number_of_matches,
                          const gfx::Rect& selection_rect,
                          int active_match_ordinal,
                          bool final_update) {}
 
@@ skipping 87 matching lines @@
   // Called when |this| is no longer the WebContentsDelegate for |source|.
   void Detach(WebContents* source);
 
   // The WebContents that this is currently a delegate for.
   std::set<WebContents*> attached_contents_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_DELEGATE_H_