Expose changes in the network quality to the renderers

content/public/browser/network_quality_observer_factory.h

+// Copyright (c) 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.
+
+#ifndef CONTENT_PUBLIC_BROWSER_NETWORK_QUALITY_OBSERVER_FACTORY_H_
+#define CONTENT_PUBLIC_BROWSER_NETWORK_QUALITY_OBSERVER_FACTORY_H_
+
+#include "base/macros.h"
+#include "content/common/content_export.h"
+#include "content/public/browser/notification_observer.h"
+#include "content/public/browser/notification_registrar.h"
+#include "content/public/browser/notification_service.h"
+#include "content/public/browser/notification_types.h"
+#include "content/public/browser/render_process_host.h"
+#include "net/nqe/network_quality_estimator.h"
+
+namespace content {
+
+// Creates network quality observer that listens for changes to the network
+// quality and manages sending updates to each RenderProcess.
+CONTENT_EXPORT std::unique_ptr<
+    net::NetworkQualityEstimator::RTTAndThroughputEstimatesObserver>
+CreateNetworkQualityObserver(
+    net::NetworkQualityEstimator* network_quality_estimator);
+
+}  // namespace content
+
+#endif  // CONTENT_PUBLIC_BROWSER_NETWORK_QUALITY_OBSERVER_FACTORY_H_