Replace NULL with nullptr in all C++ files.

webrtc/base/socketpool.cc

 /*
  *  Copyright 2004 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 43 matching lines @@
       LOG_F(LS_VERBOSE) << "Providing cached stream";
       return active_.front().second;
     }
   }
   if (StreamInterface* stream = pool_->RequestConnectedStream(remote, err)) {
     // We track active streams so that we can remember their address
     active_.push_front(ConnectedStream(remote, stream));
     LOG_F(LS_VERBOSE) << "Providing new stream";
     return active_.front().second;
   }
-  return NULL;
+  return nullptr;
 }
 
 void StreamCache::ReturnConnectedStream(StreamInterface* stream) {
   for (ConnectedList::iterator it = active_.begin(); it != active_.end();
        ++it) {
     if (stream == it->second) {
       LOG_F(LS_VERBOSE) << "(" << it->first << ")";
       if (stream->GetState() == SS_CLOSED) {
         // Return closed streams
         LOG_F(LS_VERBOSE) << "Returning closed stream";
@@ skipping 42 matching lines @@
 NewSocketPool::~NewSocketPool() {
 }
 
 StreamInterface*
 NewSocketPool::RequestConnectedStream(const SocketAddress& remote, int* err) {
   AsyncSocket* socket =
       factory_->CreateAsyncSocket(remote.family(), SOCK_STREAM);
   if (!socket) {
     if (err)
       *err = -1;
-    return NULL;
+    return nullptr;
   }
   if ((socket->Connect(remote) != 0) && !socket->IsBlocking()) {
     if (err)
       *err = socket->GetError();
     delete socket;
-    return NULL;
+    return nullptr;
   }
   if (err)
     *err = 0;
   return new SocketStream(socket);
 }
 
 void
 NewSocketPool::ReturnConnectedStream(StreamInterface* stream) {
   Thread::Current()->Dispose(stream);
 }
 
 //////////////////////////////////////////////////////////////////////
 // ReuseSocketPool
 //////////////////////////////////////////////////////////////////////
 
 ReuseSocketPool::ReuseSocketPool(SocketFactory* factory)
-: factory_(factory), stream_(NULL), checked_out_(false) {
-}
+    : factory_(factory), stream_(nullptr), checked_out_(false) {}
 
 ReuseSocketPool::~ReuseSocketPool() {
   RTC_DCHECK(!checked_out_);
   delete stream_;
 }
 
 StreamInterface*
 ReuseSocketPool::RequestConnectedStream(const SocketAddress& remote, int* err) {
   // Only one socket can be used from this "pool" at a time
   RTC_DCHECK(!checked_out_);
   if (!stream_) {
     LOG_F(LS_VERBOSE) << "Creating new socket";
     int family = remote.family();
     // TODO: Deal with this when we/I clean up DNS resolution.
     if (remote.IsUnresolvedIP()) {
       family = AF_INET;
     }
     AsyncSocket* socket =
         factory_->CreateAsyncSocket(family, SOCK_STREAM);
     if (!socket) {
       if (err)
         *err = -1;
-      return NULL;
+      return nullptr;
     }
     stream_ = new SocketStream(socket);
   }
   if ((stream_->GetState() == SS_OPEN) && (remote == remote_)) {
     LOG_F(LS_VERBOSE) << "Reusing connection to: " << remote_;
   } else {
     remote_ = remote;
     stream_->Close();
     if ((stream_->GetSocket()->Connect(remote_) != 0)
         && !stream_->GetSocket()->IsBlocking()) {
       if (err)
         *err = stream_->GetSocket()->GetError();
-      return NULL;
+      return nullptr;
     } else {
       LOG_F(LS_VERBOSE) << "Opening connection to: " << remote_;
     }
   }
   stream_->SignalEvent.disconnect(this);
   checked_out_ = true;
   if (err)
     *err = 0;
   return stream_;
 }
@@ skipping 62 matching lines @@
                   << " to " << remote;
     if (recycle_bin_.empty()) {
       return new LoggingAdapter(stream, level_, ss.str(), binary_mode_);
     }
     LoggingAdapter* logging = recycle_bin_.front();
     recycle_bin_.pop_front();
     logging->set_label(ss.str());
     logging->Attach(stream);
     return logging;
   }
-  return NULL;
+  return nullptr;
 }
 
 void LoggingPoolAdapter::ReturnConnectedStream(StreamInterface* stream) {
   LoggingAdapter* logging = static_cast<LoggingAdapter*>(stream);
   pool_->ReturnConnectedStream(logging->Detach());
   recycle_bin_.push_back(logging);
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
 } // namespace rtc