Calls to rph updating existing handlers are ignored.

chrome/browser/custom_handlers/protocol_handler_registry.h

 // Copyright (c) 2011 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_CUSTOM_HANDLERS_PROTOCOL_HANDLER_REGISTRY_H_
 #define CHROME_BROWSER_CUSTOM_HANDLERS_PROTOCOL_HANDLER_REGISTRY_H_
 #pragma once
 
 #include <map>
 #include <string>
@@ skipping 68 matching lines @@
   };
 
   typedef std::map<std::string, ProtocolHandler> ProtocolHandlerMap;
   typedef std::vector<ProtocolHandler> ProtocolHandlerList;
   typedef std::map<std::string, ProtocolHandlerList> ProtocolHandlerMultiMap;
   typedef std::vector<DefaultClientObserver*> DefaultClientObserverList;
 
   ProtocolHandlerRegistry(Profile* profile, Delegate* delegate);
   ~ProtocolHandlerRegistry();
 
+  // Called when a site tries to register as a protocol handler. If the request
+  // can be handled silently by the registry - either to ignore the request
+  // or to update an existing handler - the request will succeed. If this
+  // function returns false the user needs to be prompted for confirmation.
+  bool SilentlyHandleRegisterHandlerRequest(const ProtocolHandler& handler);
+
   // Called when the user accepts the registration of a given protocol handler.
   void OnAcceptRegisterProtocolHandler(const ProtocolHandler& handler);
 
   // Called when the user denies the registration of a given protocol handler.
   void OnDenyRegisterProtocolHandler(const ProtocolHandler& handler);
 
   // Called when the user indicates that they don't want to be asked about the
   // given protocol handler again.
   void OnIgnoreRegisterProtocolHandler(const ProtocolHandler& handler);
 
@@ skipping 175 matching lines @@
   DefaultClientObserverList default_client_observers_;
 
   // Copy of default_handlers_ that is only accessed on the IO thread.
   ProtocolHandlerMap default_handlers_io_;
 
   friend class ProtocolHandlerRegistryTest;
 
   DISALLOW_COPY_AND_ASSIGN(ProtocolHandlerRegistry);
 };
 #endif  // CHROME_BROWSER_CUSTOM_HANDLERS_PROTOCOL_HANDLER_REGISTRY_H_