Replace NULL with nullptr in all C++ files.

webrtc/test/rtp_file_writer_unittest.cc

 /*
  *  Copyright (c) 2014 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 10 matching lines @@
 
 class RtpFileWriterTest : public ::testing::Test {
  public:
   void Init(const std::string& filename) {
     filename_ = test::OutputPath() + filename;
     rtp_writer_.reset(
         test::RtpFileWriter::Create(test::RtpFileWriter::kRtpDump, filename_));
   }
 
   void WriteRtpPackets(int num_packets) {
-    ASSERT_TRUE(rtp_writer_.get() != NULL);
+    ASSERT_TRUE(rtp_writer_.get() != nullptr);
     test::RtpPacket packet;
     for (int i = 1; i <= num_packets; ++i) {
       packet.length = i;
       packet.original_length = i;
       packet.time_ms = i;
       memset(packet.data, i, packet.length);
       EXPECT_TRUE(rtp_writer_->WritePacket(&packet));
     }
   }
 
   void CloseOutputFile() { rtp_writer_.reset(); }
 
   void VerifyFileContents(int expected_packets) {
-    ASSERT_TRUE(rtp_writer_.get() == NULL)
+    ASSERT_TRUE(rtp_writer_.get() == nullptr)
         << "Must call CloseOutputFile before VerifyFileContents";
     std::unique_ptr<test::RtpFileReader> rtp_reader(
         test::RtpFileReader::Create(test::RtpFileReader::kRtpDump, filename_));
-    ASSERT_TRUE(rtp_reader.get() != NULL);
+    ASSERT_TRUE(rtp_reader.get() != nullptr);
     test::RtpPacket packet;
     int i = 0;
     while (rtp_reader->NextPacket(&packet)) {
       ++i;
       EXPECT_EQ(static_cast<size_t>(i), packet.length);
       EXPECT_EQ(static_cast<size_t>(i), packet.original_length);
       EXPECT_EQ(static_cast<uint32_t>(i), packet.time_ms);
       for (int j = 0; j < i; ++j) {
         EXPECT_EQ(i, packet.data[j]);
       }
     }
     EXPECT_EQ(expected_packets, i);
   }
 
  private:
   std::unique_ptr<test::RtpFileWriter> rtp_writer_;
   std::string filename_;
 };
 
 TEST_F(RtpFileWriterTest, WriteToRtpDump) {
   Init("test_rtp_file_writer.rtp");
   WriteRtpPackets(10);
   CloseOutputFile();
   VerifyFileContents(10);
 }
 
 }  // namespace webrtc