Add GCMChannelStatusRequest to talk with server for all users

components/gcm_driver/gcm_backoff_policy.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_GCM_BACKOFF_POLICY_H_
+#define COMPONENTS_GCM_DRIVER_GCM_BACKOFF_POLICY_H_
+
+#include "net/base/backoff_entry.h"
+
+namespace gcm {
+
+// Returns the backoff policy that applies to all GCM requests.
+const net::BackoffEntry::Policy& GetGCMBackoffPolicy();
+
+}  // namespace gcm
+
+#endif  // COMPONENTS_GCM_DRIVER_GCM_BACKOFF_POLICY_H_