Add a type to uniquely identify a Background Fetch

content/browser/background_fetch/background_fetch_registration_id.cc

Index: content/browser/background_fetch/background_fetch_registration_id.cc
diff --git a/content/browser/background_fetch/background_fetch_registration_id.cc b/content/browser/background_fetch/background_fetch_registration_id.cc
new file mode 100644
index 0000000000000000000000000000000000000000..46d6c67928a51a2ca0b82c054392680dfbe8a6de
--- /dev/null
+++ b/content/browser/background_fetch/background_fetch_registration_id.cc
@@ -0,0 +1,41 @@
+// Copyright 2017 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.
+
+#include "content/browser/background_fetch/background_fetch_registration_id.h"
+
+namespace content {
+
+BackgroundFetchRegistrationId::BackgroundFetchRegistrationId(
+    int64_t service_worker_registration_id,
+    const url::Origin& origin,
+    const std::string& tag)
+    : service_worker_registration_id_(service_worker_registration_id),
+      origin_(origin),
+      tag_(tag) {}
+
+BackgroundFetchRegistrationId::BackgroundFetchRegistrationId(
+    BackgroundFetchRegistrationId&& other) = default;
+
+BackgroundFetchRegistrationId::~BackgroundFetchRegistrationId() = default;
+
+bool BackgroundFetchRegistrationId::operator==(
+    const BackgroundFetchRegistrationId& other) const {
+  return other.service_worker_registration_id_ ==
+             service_worker_registration_id_ &&
+         other.origin_ == origin_ && other.tag_ == tag_;
+}
+
+bool BackgroundFetchRegistrationId::operator!=(
+    const BackgroundFetchRegistrationId& other) const {
+  return !(*this == other);
+}
+
+bool BackgroundFetchRegistrationId::operator<(
+    const BackgroundFetchRegistrationId& other) const {
+  return service_worker_registration_id_ <
+             other.service_worker_registration_id_ ||
+         origin_ < other.origin_ || tag_ < other.tag_;
+}
+
+}  // namespace content