Replace NULL with nullptr or null in webrtc/base/.

webrtc/base/socketaddress_unittest.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 219 matching lines @@
   EXPECT_EQ(5678, addr.port());
   EXPECT_EQ("", addr.hostname());
   EXPECT_EQ(kTestV6AddrFullString, addr.ToString());
   EXPECT_EQ(6, addr.scope_id());
 
   addr = from;
   addr_storage.ss_family = AF_UNSPEC;
   EXPECT_FALSE(SocketAddressFromSockAddrStorage(addr_storage, &addr));
   EXPECT_EQ(from, addr);
 
-  EXPECT_FALSE(SocketAddressFromSockAddrStorage(addr_storage, NULL));
+  EXPECT_FALSE(SocketAddressFromSockAddrStorage(addr_storage, nullptr));
 }
 
 bool AreEqual(const SocketAddress& addr1,
               const SocketAddress& addr2) {
   return addr1 == addr2 && addr2 == addr1 &&
       !(addr1 != addr2) && !(addr2 != addr1);
 }
 
 bool AreUnequal(const SocketAddress& addr1,
                 const SocketAddress& addr2) {
@@ skipping 91 matching lines @@
   EXPECT_EQ("[" + kTestV6AddrAnonymizedString + "]",
             addr_v6.HostAsSensitiveURIString());
   EXPECT_EQ(kTestV6AddrFullAnonymizedString, addr_v6.ToSensitiveString());
 #else
   EXPECT_EQ("[" + kTestV6AddrString + "]", addr_v6.HostAsSensitiveURIString());
   EXPECT_EQ(kTestV6AddrFullString, addr_v6.ToSensitiveString());
 #endif  // defined(NDEBUG)
 }
 
 }  // namespace rtc