Revert "Adding GCM support to the copresence component. The Copresence server can push directives (…

components/copresence/handlers/gcm_handler.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_COPRESENCE_HANDLERS_GCM_HANDLER_H_
-#define COMPONENTS_COPRESENCE_HANDLERS_GCM_HANDLER_H_
-
-#include <string>
-#include <vector>
-
-#include "base/callback.h"
-#include "base/memory/weak_ptr.h"
-#include "components/gcm_driver/gcm_app_handler.h"
-#include "components/gcm_driver/gcm_client.h"
-
-namespace gcm {
-class GCMDriver;
-}
-
-namespace copresence {
-
-class DirectiveHandler;
-
-// This class handles GCM messages from the Copresence server.
-class GCMHandler final : public gcm::GCMAppHandler,
-                         public base::SupportsWeakPtr<GCMHandler> {
- public:
-  // Callback to report that registration has completed.
-  // Returns an empty ID if registration failed.
-  using RegistrationCallback = base::Callback<void(const std::string&)>;
-
-  static const char kCopresenceAppId[];
-  static const char kCopresenceSenderId[];
-  static const char kGcmMessageKey[];
-
-  // |gcm_driver| is required, but may disappear if we get a ShutdownHandler()
-  // call first. |directive_handler| must outlive us. The caller owns both.
-  GCMHandler(gcm::GCMDriver* gcm_driver,
-             DirectiveHandler* directive_handler);
-  ~GCMHandler() override;
-
-  // Request the GCM ID. It may be returned now or later, via the callback.
-  void GetGcmId(const RegistrationCallback& callback);
-
-  // GCMAppHandler overrides
-  void ShutdownHandler() override;
-  void OnMessage(const std::string& app_id,
-                 const gcm::GCMClient::IncomingMessage& message) override;
-  void OnMessagesDeleted(const std::string& app_id) override;
-  void OnSendError(
-      const std::string& /* app_id */,
-      const gcm::GCMClient::SendErrorDetails& /* send_error_details */)
-      override;
-  void OnSendAcknowledged(const std::string& /* app_id */,
-                          const std::string& /* message_id */) override;
-  bool CanHandle(const std::string& app_id) const override;
-
- private:
-  // GCM Registration has finished. Notify clients as appropriate.
-  void RegistrationComplete(const std::string& registration_id,
-                            gcm::GCMClient::Result result);
-
-  gcm::GCMDriver* driver_;
-  DirectiveHandler* const directive_handler_;
-
-  // TODO(ckehoe): Change this to a CancelableCallback.
-  base::Callback<void(const std::string&,
-                      gcm::GCMClient::Result)> registration_callback_;
-
-  std::string gcm_id_;
-  std::vector<RegistrationCallback> pending_id_requests_;
-
-  DISALLOW_COPY_AND_ASSIGN(GCMHandler);
-};
-
-}  // namespace copresence
-
-#endif  // COMPONENTS_COPRESENCE_HANDLERS_GCM_HANDLER_H_