Add support for unregistering web intents default by service_url.

chrome/browser/intents/web_intents_registry.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 CHROME_BROWSER_INTENTS_WEB_INTENTS_REGISTRY_H_
 #define CHROME_BROWSER_INTENTS_WEB_INTENTS_REGISTRY_H_
 
 #include "base/callback_forward.h"
 #include "base/hash_tables.h"
 #include "base/memory/ref_counted.h"
@@ skipping 77 matching lines @@
 
   // Record the given default service entry.
   virtual void RegisterDefaultIntentService(
       const DefaultWebIntentService& default_service);
 
   // Delete the given default service entry. Deletes entries matching
   // the |action|, |type|, and |url_pattern| of |default_service|.
   virtual void UnregisterDefaultIntentService(
       const DefaultWebIntentService& default_service);
 
+  // Delete all default service entries associated with |service_url|.
+  virtual void UnregisterDefaultServices(const GURL& service_url);

[James Hawkins, 2012/08/08 20:30:11]

'Services' here is a misnomer, since we're technically unregistering multiple
intent filter defaults for a single service.

+
   // Requests the best default intent service for the given invocation
   // parameters.
   // |callback| must not be null.
   void GetDefaultIntentService(const string16& action,
                                const string16& type,
                                const GURL& invoking_url,
                                const DefaultQueryCallback& callback);
 
  protected:
   // Make sure that only WebIntentsRegistryFactory can create an instance of
@@ skipping 60 matching lines @@
   // Shutdown/cleanup is handled by ProfileImpl. We are  guaranteed that any
   // ProfileKeyedService will be shut down before data on ProfileImpl is
   // destroyed (i.e. |extension_service_|), so |extension_service_| is valid
   // for the lifetime of the WebIntentsRegistry object.
   ExtensionServiceInterface* extension_service_;
 
   DISALLOW_COPY_AND_ASSIGN(WebIntentsRegistry);
 };
 
 #endif  // CHROME_BROWSER_INTENTS_WEB_INTENTS_REGISTRY_H_