Check media permissions (mic/camera) before exposing local addresses to WebRTC.

content/renderer/p2p/empty_network_manager.cc

+// 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.
+
+#include "content/renderer/p2p/empty_network_manager.h"
+
+#include "base/bind.h"
+#include "base/location.h"
+#include "base/logging.h"
+#include "base/thread_task_runner_handle.h"
+#include "content/renderer/p2p/network_manager_uma.h"
+
+namespace content {
+
+EmptyNetworkManager::EmptyNetworkManager() : weak_ptr_factory_(this) {
+  thread_checker_.DetachFromThread();
+  set_enumeration_permission(ENUMERATION_BLOCKED);
+}
+
+EmptyNetworkManager::~EmptyNetworkManager() {
+  DCHECK(thread_checker_.CalledOnValidThread());
+}
+
+void EmptyNetworkManager::StartUpdating() {
+  DCHECK(thread_checker_.CalledOnValidThread());
+
+  FireEvent();
+  updating_started_ = true;
+}
+
+void EmptyNetworkManager::StopUpdating() {
+  DCHECK(thread_checker_.CalledOnValidThread());
+}
+
+void EmptyNetworkManager::GetNetworks(NetworkList* networks) const {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  networks->clear();
+}
+
+void EmptyNetworkManager::FireEvent() {
+  if (!updating_started_)
+    ReportIPPermissionStatus(PERMISSION_NOT_REQUESTED);
+
+  // Post a task to avoid reentrancy.
+  base::ThreadTaskRunnerHandle::Get()->PostTask(
+      FROM_HERE, base::Bind(&EmptyNetworkManager::SendNetworksChangedSignal,
+                            weak_ptr_factory_.GetWeakPtr()));
+}
+
+void EmptyNetworkManager::SendNetworksChangedSignal() {
+  SignalNetworksChanged();
+}
+
+}  // namespace content