Implement unregisterProtocolHandler()

content/browser/web_contents/web_contents_impl.cc

Index: content/browser/web_contents/web_contents_impl.cc
diff --git a/content/browser/web_contents/web_contents_impl.cc b/content/browser/web_contents/web_contents_impl.cc
index 918e90defe8aa4ff2b2f62678c4ba7a76bc7055b..694f3b68eebf085e9b90ab6ed0e54eee8437f40b 100644
--- a/content/browser/web_contents/web_contents_impl.cc
+++ b/content/browser/web_contents/web_contents_impl.cc
@@ -534,6 +534,8 @@ bool WebContentsImpl::OnMessageReceived(RenderViewHost* render_view_host,
     IPC_MESSAGE_HANDLER(ViewHostMsg_EnumerateDirectory, OnEnumerateDirectory)
     IPC_MESSAGE_HANDLER(ViewHostMsg_RegisterProtocolHandler,
                         OnRegisterProtocolHandler)
+    IPC_MESSAGE_HANDLER(ViewHostMsg_UnregisterProtocolHandler,
+                        OnUnregisterProtocolHandler)
     IPC_MESSAGE_HANDLER(ViewHostMsg_Find_Reply, OnFindReply)
     IPC_MESSAGE_HANDLER(ViewHostMsg_AppCacheAccessed, OnAppCacheAccessed)
     IPC_MESSAGE_HANDLER(ViewHostMsg_WebUISend, OnWebUISend)
@@ -2726,6 +2728,20 @@ void WebContentsImpl::OnRegisterProtocolHandler(const std::string& protocol,
   delegate_->RegisterProtocolHandler(this, protocol, url, user_gesture);
 }
 
+void WebContentsImpl::OnUnregisterProtocolHandler(const std::string& protocol,
+                                                  const GURL& url,
+                                                  bool user_gesture) {
+  if (!delegate_)
+    return;
+
+  ChildProcessSecurityPolicyImpl* policy =
+      ChildProcessSecurityPolicyImpl::GetInstance();
+  if (policy->IsPseudoScheme(protocol))
+    return;
+
+  delegate_->UnregisterProtocolHandler(this, protocol, url, user_gesture);
+}
+
 void WebContentsImpl::OnFindReply(int request_id,
                                   int number_of_matches,
                                   const gfx::Rect& selection_rect,