Support getting and deleting token for Instance ID.

google_apis/gcm/engine/gcm_unregistration_request.h

+// Copyright 2015 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 GOOGLE_APIS_GCM_ENGINE_GCM_UNREGISTRATION_REQUEST_H_
+#define GOOGLE_APIS_GCM_ENGINE_GCM_UNREGISTRATION_REQUEST_H_
+
+#include "google_apis/gcm/engine/unregistration_request.h"
+
+namespace gcm {
+
+// Used to revoke the registration ID when unregister is called or the
+// application has been uninstalled.
+class GCM_EXPORT GCMUnregistrationRequest : public UnregistrationRequest {
+ public:
+  GCMUnregistrationRequest(
+      const GURL& registration_url,
+      const RequestInfo& request_info,
+      const net::BackoffEntry::Policy& backoff_policy,
+      const UnregistrationCallback& callback,
+      scoped_refptr<net::URLRequestContextGetter> request_context_getter,
+      GCMStatsRecorder* recorder);
+  ~GCMUnregistrationRequest() override;
+
+  // UnregistrationRequest overrides:
+  void BuildRequestBody(std::string* body) override;
+  bool ParseResponse(const net::URLFetcher* source,
+                      UnregistrationRequest::Status* status) override;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(GCMUnregistrationRequest);
+};
+
+}  // namespace gcm
+
+#endif  // GOOGLE_APIS_GCM_ENGINE_GCM_UNREGISTRATION_REQUEST_H_