Skeleton GCMAppHandler for Push API

components/gcm_driver/gcm_app_handler.h

 // Copyright (c) 2014 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 COMPONENTS_GCM_DRIVER_GCM_APP_HANDLER_H_
 #define COMPONENTS_GCM_DRIVER_GCM_APP_HANDLER_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 19 matching lines @@
 
   // Called when some GCM messages have been deleted from the server.
   virtual void OnMessagesDeleted(const std::string& app_id) = 0;
 
   // Called when a GCM message failed to be delivered.
   virtual void OnSendError(
       const std::string& app_id,
       const GCMClient::SendErrorDetails& send_error_details) = 0;
 };
 
+class GCMWildcardAppHandler : public GCMAppHandler {
+ public:
+  GCMWildcardAppHandler() {}
+  virtual ~GCMWildcardAppHandler() {}
+
+  // If no ordinary app handler has been added with the exact app_id of an
+  // incoming event, all GCMWildcardAppHandlers will be asked (in arbitrary
+  // order) whether they can handle the app_id, and the first to return true
+  // will receive the event.
+  virtual bool CanHandle(const std::string& app_id) const = 0;
+};
+
 }  // namespace gcm
 
 #endif  // COMPONENTS_GCM_DRIVER_GCM_APP_HANDLER_H_