Replace NULL with nullptr in all C++ files.

webrtc/modules/audio_processing/transient/wpd_tree_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 25 matching lines @@
                test_coefficients,
                test_coefficients,
                kTestCoefficientsLength,
                kLevels);
   ASSERT_EQ(kExpectedNumberOfNodes, tree.num_nodes());
   // Checks for NodeAt(level, index).
   int nodes_at_level = 0;
   for (int level = 0; level <= kLevels; ++level) {
     nodes_at_level = 1 << level;
     for (int i = 0; i < nodes_at_level; ++i) {
-      ASSERT_TRUE(NULL != tree.NodeAt(level, i));
+      ASSERT_TRUE(nullptr != tree.NodeAt(level, i));
     }
     // Out of bounds.
-    EXPECT_EQ(NULL, tree.NodeAt(level, -1));
-    EXPECT_EQ(NULL, tree.NodeAt(level, -12));
-    EXPECT_EQ(NULL, tree.NodeAt(level, nodes_at_level));
-    EXPECT_EQ(NULL, tree.NodeAt(level, nodes_at_level + 5));
+    EXPECT_EQ(nullptr, tree.NodeAt(level, -1));
+    EXPECT_EQ(nullptr, tree.NodeAt(level, -12));
+    EXPECT_EQ(nullptr, tree.NodeAt(level, nodes_at_level));
+    EXPECT_EQ(nullptr, tree.NodeAt(level, nodes_at_level + 5));
   }
   // Out of bounds.
-  EXPECT_EQ(NULL, tree.NodeAt(-1, 0));
-  EXPECT_EQ(NULL, tree.NodeAt(-12, 0));
-  EXPECT_EQ(NULL, tree.NodeAt(kLevels + 1, 0));
-  EXPECT_EQ(NULL, tree.NodeAt(kLevels + 5, 0));
+  EXPECT_EQ(nullptr, tree.NodeAt(-1, 0));
+  EXPECT_EQ(nullptr, tree.NodeAt(-12, 0));
+  EXPECT_EQ(nullptr, tree.NodeAt(kLevels + 1, 0));
+  EXPECT_EQ(nullptr, tree.NodeAt(kLevels + 5, 0));
   // Checks for Update().
   EXPECT_EQ(0, tree.Update(test_buffer, kTestBufferSize));
-  EXPECT_EQ(-1, tree.Update(NULL, kTestBufferSize));
+  EXPECT_EQ(-1, tree.Update(nullptr, kTestBufferSize));
   EXPECT_EQ(-1, tree.Update(test_buffer, kTestBufferSize - 1));
 }
 
 // This test is for the correctness of the tree.
 // Checks the results from the Matlab equivalent, it is done comparing the
 // results that are stored in the output files from Matlab.
 // It also writes the results in its own set of files in the out directory.
 // Matlab and output files contain all the results in double precision (Little
 // endian) appended.
 #if defined(WEBRTC_IOS)
@@ skipping 112 matching lines @@
   // Close all matlab and out files.
   for (int i = 0; i < kLeaves; ++i) {
     matlab_files_data[i]->CloseFile();
     out_files_data[i]->CloseFile();
   }
 
   test_file->CloseFile();
 }
 
 }  // namespace webrtc