Delete SignalThread class.

webrtc/p2p/base/turnport.cc

Index: webrtc/p2p/base/turnport.cc
diff --git a/webrtc/p2p/base/turnport.cc b/webrtc/p2p/base/turnport.cc
index e3caeb59d3e6b43c93310f10f25866aa45f47eea..fff0d8c974e3faf751b5766bbe097e31dc84fb7a 100644
--- a/webrtc/p2p/base/turnport.cc
+++ b/webrtc/p2p/base/turnport.cc
@@ -200,7 +200,7 @@ TurnPort::TurnPort(rtc::Thread* thread,
       server_address_(server_address),
       credentials_(credentials),
       socket_(socket),
-      resolver_(NULL),
+      resolver_(),

[tommi, 2017/06/19 13:01:47]

nit: remove from the initializer list since it'll be default constructed

[nisse-webrtc, 2017/06/19 14:07:20]

Done. Here and below.

       error_(0),
       request_manager_(thread),
       next_channel_number_(TURN_CHANNEL_NUMBER_START),
@@ -235,7 +235,7 @@ TurnPort::TurnPort(rtc::Thread* thread,
       server_address_(server_address),
       credentials_(credentials),
       socket_(NULL),
-      resolver_(NULL),
+      resolver_(),

[tommi, 2017/06/19 13:01:47]

nit: remove (we don't include default constructed stl in initializer lists)

       error_(0),
       request_manager_(thread),
       next_channel_number_(TURN_CHANNEL_NUMBER_START),
@@ -679,13 +679,13 @@ void TurnPort::ResolveTurnAddress(const rtc::SocketAddress& address) {
 
   LOG_J(LS_INFO, this) << "Starting TURN host lookup for "
                        << address.ToSensitiveString();
-  resolver_ = socket_factory()->CreateAsyncResolver();
+  resolver_ = rtc::WrapUnique(socket_factory()->CreateAsyncResolver());
   resolver_->SignalDone.connect(this, &TurnPort::OnResolveResult);
   resolver_->Start(address);
 }
 
 void TurnPort::OnResolveResult(rtc::AsyncResolverInterface* resolver) {
-  RTC_DCHECK(resolver == resolver_);
+  RTC_DCHECK(resolver == resolver_.get());
   // If DNS resolve is failed when trying to connect to the server using TCP,
   // one of the reason could be due to DNS queries blocked by firewall.
   // In such cases we will try to connect to the server with hostname, assuming