Provide a mechanism for the GCM driver to send message receipts to GCM.

components/gcm_driver/fake_gcm_client.h

 // Copyright 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_FAKE_GCM_CLIENT_H_
 #define COMPONENTS_GCM_DRIVER_FAKE_GCM_CLIENT_H_
 
 #include <map>
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "components/gcm_driver/gcm_client.h"
+#include "components/gcm_driver/gcm_message_status.h"
 #include "components/gcm_driver/gcm_stats_recorder_impl.h"
 
 namespace base {
 class SequencedTaskRunner;
 }
 
 namespace gcm {
 
 class FakeGCMClient : public GCMClient {
  public:
@@ skipping 56 matching lines @@
   void AddHeartbeatInterval(const std::string& scope, int interval_ms) override;
   void RemoveHeartbeatInterval(const std::string& scope) override;
 
   // Initiate the start that has been delayed.
   // Called on UI thread.
   void PerformDelayedStart();
 
   // Simulate receiving something from the server.
   // Called on UI thread.
   void ReceiveMessage(const std::string& app_id,
+                      const std::string& message_id,
                       const IncomingMessage& message);
   void DeleteMessages(const std::string& app_id);
 
   void set_start_mode_overridding(StartModeOverridding overridding) {
     start_mode_overridding_ = overridding;
   }
 
+  const std::string& receipt_app_id() { return receipt_app_id_; }
+  const std::string& receipt_message_id() { return receipt_message_id_; }
+  GCMMessageStatus receipt_status() { return receipt_status_; }

[Peter Beverloo, 2017/02/08 17:09:08]

nit: these methods can be const

[harkness, 2017/02/09 16:27:29]

Done.

+
  private:
   // Called on IO thread.
   void DoStart();
   void Started();
   void RegisterFinished(
       const linked_ptr<RegistrationInfo>& registration_info,
       const std::string& registrion_id);
   void UnregisterFinished(
       const linked_ptr<RegistrationInfo>& registration_info);
   void SendFinished(const std::string& app_id, const OutgoingMessage& message);
   void MessageReceived(const std::string& app_id,
-                       const IncomingMessage& message);
+                       const IncomingMessage& message,
+                       const MessageReceiptCallback& callback);
   void MessagesDeleted(const std::string& app_id);
   void MessageSendError(const std::string& app_id,
                         const SendErrorDetails& send_error_details);
   void SendAcknowledgement(const std::string& app_id,
                            const std::string& message_id);
+  void SendMessageReceipt(const std::string& message_id,
+                          const std::string& app_id,
+                          GCMMessageStatus status);
 
   Delegate* delegate_;
   std::string product_category_for_subtypes_;
   bool started_;
   StartMode start_mode_;
   StartModeOverridding start_mode_overridding_;
   scoped_refptr<base::SequencedTaskRunner> ui_thread_;
   scoped_refptr<base::SequencedTaskRunner> io_thread_;
   std::map<std::string, std::pair<std::string, std::string>> instance_id_data_;
   GCMStatsRecorderImpl recorder_;
+  std::string receipt_app_id_;
+  std::string receipt_message_id_;
+  GCMMessageStatus receipt_status_;
   base::WeakPtrFactory<FakeGCMClient> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(FakeGCMClient);
 };
 
 }  // namespace gcm
 
 #endif  // COMPONENTS_GCM_DRIVER_FAKE_GCM_CLIENT_H_