Replace NULL with nullptr in all C++ files.

webrtc/modules/audio_processing/transient/dyadic_decimator_unittest.cc

 /*
  *  Copyright (c) 2013 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 15 matching lines @@
   EXPECT_EQ(3u, GetOutLengthToDyadicDecimate(6, false));
   EXPECT_EQ(3u, GetOutLengthToDyadicDecimate(6, true));
   EXPECT_EQ(3u, GetOutLengthToDyadicDecimate(5, false));
   EXPECT_EQ(2u, GetOutLengthToDyadicDecimate(5, true));
 }
 
 
 TEST(DyadicDecimatorTest, DyadicDecimateErrorValues) {
   size_t out_samples = 0;
 
-  out_samples = DyadicDecimate(static_cast<int16_t*>(NULL),
-                               kEvenBufferLength,
-                               false,  // Even sequence.
-                               test_buffer_out,
-                               kOutBufferLength);
+  out_samples =
+      DyadicDecimate(static_cast<int16_t*>(nullptr), kEvenBufferLength,
+                     false,  // Even sequence.
+                     test_buffer_out, kOutBufferLength);
   EXPECT_EQ(0u, out_samples);
 
-  out_samples = DyadicDecimate(test_buffer_even_len,
-                               kEvenBufferLength,
-                               false,  // Even sequence.
-                               static_cast<int16_t*>(NULL),
-                               kOutBufferLength);
+  out_samples =
+      DyadicDecimate(test_buffer_even_len, kEvenBufferLength,
+                     false,  // Even sequence.
+                     static_cast<int16_t*>(nullptr), kOutBufferLength);
   EXPECT_EQ(0u, out_samples);
 
   // Less than required |out_length|.
   out_samples = DyadicDecimate(test_buffer_even_len,
                                kEvenBufferLength,
                                false,  // Even sequence.
                                test_buffer_out,
                                2);
   EXPECT_EQ(0u, out_samples);
 }
@@ skipping 59 matching lines @@
                                       test_buffer_out,
                                       kOutBufferLength);
 
   EXPECT_EQ(expected_out_samples, out_samples);
 
   EXPECT_EQ(1, test_buffer_out[0]);
   EXPECT_EQ(3, test_buffer_out[1]);
 }
 
 }  // namespace webrtc