Replace NULL with nullptr in all C++ files.

webrtc/voice_engine/test/channel_transport/udp_socket_manager_unittest.cc

 /*
  *  Copyright (c) 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 22 matching lines @@
   UdpSocketManager::Return();
 }
 
 // Creates a socket and adds it to the socket manager, and then removes it
 // before destroying the socket manager.
 TEST(UdpSocketManager, AddAndRemoveSocketDoesNotLeakMemory) {
   int32_t id = 42;
   uint8_t threads = 1;
   UdpSocketManager* mgr = UdpSocketManager::Create(id, threads);
   UdpSocketWrapper* socket =
-      UdpSocketWrapper::CreateSocket(id,
-                                     mgr,
-                                     NULL,  // CallbackObj
-                                     NULL,  // IncomingSocketCallback
-                                     false,  // ipV6Enable
-                                     false);  // disableGQOS
+      UdpSocketWrapper::CreateSocket(id, mgr,
+                                     nullptr,  // CallbackObj
+                                     nullptr,  // IncomingSocketCallback
+                                     false,    // ipV6Enable
+                                     false);   // disableGQOS
   // The constructor will do AddSocket on the manager.
   // RemoveSocket indirectly calls Delete.
   EXPECT_EQ(true, mgr->RemoveSocket(socket));
   UdpSocketManager::Return();
 }
 
 // Creates a socket and add it to the socket manager, but does not remove it
 // before destroying the socket manager.
 // On Posix, this destroys the socket.
 // On Winsock2 Windows, it enters an infinite wait for all the sockets
 // to go away.
 TEST(UdpSocketManager, UnremovedSocketsGetCollectedAtManagerDeletion) {
 #if defined(_WIN32)
   // It's hard to test an infinite wait, so we don't.
 #else
   int32_t id = 42;
   uint8_t threads = 1;
   UdpSocketManager* mgr = UdpSocketManager::Create(id, threads);
-  UdpSocketWrapper* unused_socket = UdpSocketWrapper::CreateSocket(
-      id,
-      mgr,
-      NULL,  // CallbackObj
-      NULL,  // IncomingSocketCallback
-      false,  // ipV6Enable
-      false);  // disableGQOS
+  UdpSocketWrapper* unused_socket =
+      UdpSocketWrapper::CreateSocket(id, mgr,
+                                     nullptr,  // CallbackObj
+                                     nullptr,  // IncomingSocketCallback
+                                     false,    // ipV6Enable
+                                     false);   // disableGQOS
   // The constructor will do AddSocket on the manager.
   // Call a member funtion to work around "set but not used" compliation
   // error on ChromeOS ARM.
   unused_socket->SetEventToNull();
-  unused_socket = NULL;
+  unused_socket = nullptr;
   UdpSocketManager::Return();
 #endif
 }
 
 }  // namespace test
 }  // namespace webrtc