Switching some interfaces to use std::unique_ptr<>.

webrtc/examples/peerconnection/client/conductor.cc

 /*
  *  Copyright 2012 The WebRTC Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 348 matching lines @@
   }
 
   if (InitializePeerConnection()) {
     peer_id_ = peer_id;
     peer_connection_->CreateOffer(this, NULL);
   } else {
     main_wnd_->MessageBox("Error", "Failed to initialize PeerConnection", true);
   }
 }
 
-cricket::VideoCapturer* Conductor::OpenVideoCaptureDevice() {
+std::unique_ptr<cricket::VideoCapturer> Conductor::OpenVideoCaptureDevice() {
   std::vector<std::string> device_names;
   {
     std::unique_ptr<webrtc::VideoCaptureModule::DeviceInfo> info(
         webrtc::VideoCaptureFactory::CreateDeviceInfo());
     if (!info) {
       return nullptr;
     }
     int num_devices = info->NumberOfDevices();
     for (int i = 0; i < num_devices; ++i) {
       const uint32_t kSize = 256;
       char name[kSize] = {0};
       char id[kSize] = {0};
       if (info->GetDeviceName(i, name, kSize, id, kSize) != -1) {
         device_names.push_back(name);
       }
     }
   }
 
   cricket::WebRtcVideoDeviceCapturerFactory factory;
-  cricket::VideoCapturer* capturer = nullptr;
+  std::unique_ptr<cricket::VideoCapturer> capturer;
   for (const auto& name : device_names) {
     capturer = factory.Create(cricket::Device(name, 0));
     if (capturer) {
       break;
     }
   }
   return capturer;
 }
 
 void Conductor::AddStreams() {
@@ skipping 137 matching lines @@
 }
 
 void Conductor::OnFailure(const std::string& error) {
     LOG(LERROR) << error;
 }
 
 void Conductor::SendMessage(const std::string& json_object) {
   std::string* msg = new std::string(json_object);
   main_wnd_->QueueUIThreadCallback(SEND_MESSAGE_TO_PEER, msg);
 }