Support getting and deleting token for Instance ID.

google_apis/gcm/engine/gcm_unregistration_request_handler.h

Index: google_apis/gcm/engine/gcm_unregistration_request_handler.h
diff --git a/google_apis/gcm/engine/gcm_unregistration_request_handler.h b/google_apis/gcm/engine/gcm_unregistration_request_handler.h
new file mode 100644
index 0000000000000000000000000000000000000000..ac2a5d4a353c279812b62f3591da43f6d5f5bea8
--- /dev/null
+++ b/google_apis/gcm/engine/gcm_unregistration_request_handler.h
@@ -0,0 +1,33 @@
+// 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_HANDLER_H_
+#define GOOGLE_APIS_GCM_ENGINE_GCM_UNREGISTRATION_REQUEST_HANDLER_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 GCMUnregistrationRequestHandler :
+    public UnregistrationRequest::CustomRequestHandler {
+ public:
+  GCMUnregistrationRequestHandler(const std::string& app_id);
+  ~GCMUnregistrationRequestHandler() override;
+
+  // UnregistrationRequest::CustomRequestHandler overrides:
+  void BuildRequestBody(std::string* body) override;
+  UnregistrationRequest::Status ParseResponse(
+      const net::URLFetcher* source) override;
+
+ private:
+  std::string app_id_;
+
+  DISALLOW_COPY_AND_ASSIGN(GCMUnregistrationRequestHandler);
+};
+
+}  // namespace gcm
+
+#endif  // GOOGLE_APIS_GCM_ENGINE_GCM_UNREGISTRATION_REQUEST_HANDLER_H_