Exposing NQE on the Browser UI thread

chrome/browser/net/nqe/ui_network_quality_estimator_service.cc

+// Copyright 2016 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 "chrome/browser/net/nqe/ui_network_quality_estimator_service.h"
+
+#include "base/bind.h"
+#include "base/message_loop/message_loop.h"
+#include "base/task_runner.h"
+#include "chrome/browser/browser_process.h"
+#include "chrome/browser/net/nqe/io_network_quality_observer.h"
+
+UINetworkQualityEstimatorService::UINetworkQualityEstimatorService(
+    Profile* profile)
+    : type_(net::NetworkQualityEstimator::EFFECTIVE_CONNECTION_TYPE_UNKNOWN),
+      observer_(nullptr),
+      weak_factory_(this) {
+}
+
+UINetworkQualityEstimatorService::~UINetworkQualityEstimatorService() {
+  io_task_runner_->DeleteSoon(FROM_HERE, observer_);

[tbansal1, 2016/07/01 22:22:02]

DCHECK the return value.

[RyanSturm, 2016/07/11 22:00:19]

Done.

+}
+
+void UINetworkQualityEstimatorService::Initialize(
+    scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner,
+    scoped_refptr<base::SingleThreadTaskRunner> io_task_runner) {
+  io_task_runner_ = io_task_runner;
+  observer_ =
+      new IONetworkQualityObserver(ui_task_runner, weak_factory_.GetWeakPtr());
+  io_task_runner_->PostTask(
+      FROM_HERE,
+      base::Bind(&IONetworkQualityObserver::InitializeOnIOThread,
+                 base::Unretained(observer_), g_browser_process->io_thread()));
+}
+
+void UINetworkQualityEstimatorService::Shutdown() {
+  LOG(WARNING) << "UINetworkQualityEstimatorService::Shutdown";
+  weak_factory_.InvalidateWeakPtrs();
+}
+
+void UINetworkQualityEstimatorService::EffectiveConnectionTypeChanged(
+    net::NetworkQualityEstimator::EffectiveConnectionType type) {
+  type_ = type;
+}