Replace NULL with nullptr in all C++ files.

webrtc/modules/audio_coding/neteq/decoder_database_unittest.cc

Index: webrtc/modules/audio_coding/neteq/decoder_database_unittest.cc
diff --git a/webrtc/modules/audio_coding/neteq/decoder_database_unittest.cc b/webrtc/modules/audio_coding/neteq/decoder_database_unittest.cc
index f3e6a64673833288223f0e57322b6d61e3c17f6d..2d569af20e27ca160b697c687ee2fca4ac4e697e 100644
--- a/webrtc/modules/audio_coding/neteq/decoder_database_unittest.cc
+++ b/webrtc/modules/audio_coding/neteq/decoder_database_unittest.cc
@@ -79,12 +79,12 @@ TEST(DecoderDatabase, GetDecoderInfo) {
       db.RegisterPayload(kPayloadType, NetEqDecoder::kDecoderPCMu, kCodecName));
   const DecoderDatabase::DecoderInfo* info;
   info = db.GetDecoderInfo(kPayloadType);
-  ASSERT_TRUE(info != NULL);
+  ASSERT_TRUE(info != nullptr);
   EXPECT_TRUE(info->IsType("pcmu"));
   EXPECT_EQ(kCodecName, info->get_name());
   EXPECT_EQ(decoder, db.GetDecoder(kPayloadType));
   info = db.GetDecoderInfo(kPayloadType + 1);  // Other payload type.
-  EXPECT_TRUE(info == NULL);  // Should not be found.
+  EXPECT_TRUE(info == nullptr);                // Should not be found.
 }
 
 TEST(DecoderDatabase, GetDecoder) {
@@ -95,7 +95,7 @@ TEST(DecoderDatabase, GetDecoder) {
             db.RegisterPayload(kPayloadType, NetEqDecoder::kDecoderPCM16B,
                                kCodecName));
   AudioDecoder* dec = db.GetDecoder(kPayloadType);
-  ASSERT_TRUE(dec != NULL);
+  ASSERT_TRUE(dec != nullptr);
 }
 
 TEST(DecoderDatabase, TypeTests) {
@@ -148,7 +148,7 @@ TEST(DecoderDatabase, ExternalDecoder) {
   // Get the decoder info struct and check it too.
   const DecoderDatabase::DecoderInfo* info;
   info = db.GetDecoderInfo(kPayloadType);
-  ASSERT_TRUE(info != NULL);
+  ASSERT_TRUE(info != nullptr);
   EXPECT_TRUE(info->IsType("pcmu"));
   EXPECT_EQ(info->get_name(), kCodecName);
   EXPECT_EQ(kCodecName, info->get_name());
@@ -212,40 +212,40 @@ TEST(DecoderDatabase, IF_ISAC(ActiveDecoders)) {
   ASSERT_EQ(DecoderDatabase::kOK,
             db.RegisterPayload(13, NetEqDecoder::kDecoderCNGnb, "cng-nb"));
   // Verify that no decoders are active from the start.
-  EXPECT_EQ(NULL, db.GetActiveDecoder());
-  EXPECT_EQ(NULL, db.GetActiveCngDecoder());
+  EXPECT_EQ(nullptr, db.GetActiveDecoder());
+  EXPECT_EQ(nullptr, db.GetActiveCngDecoder());
 
   // Set active speech codec.
   bool changed;  // Should be true when the active decoder changed.
   EXPECT_EQ(DecoderDatabase::kOK, db.SetActiveDecoder(0, &changed));
   EXPECT_TRUE(changed);
   AudioDecoder* decoder = db.GetActiveDecoder();
-  ASSERT_FALSE(decoder == NULL);  // Should get a decoder here.
+  ASSERT_FALSE(decoder == nullptr);  // Should get a decoder here.
 
   // Set the same again. Expect no change.
   EXPECT_EQ(DecoderDatabase::kOK, db.SetActiveDecoder(0, &changed));
   EXPECT_FALSE(changed);
   decoder = db.GetActiveDecoder();
-  ASSERT_FALSE(decoder == NULL);  // Should get a decoder here.
+  ASSERT_FALSE(decoder == nullptr);  // Should get a decoder here.
 
   // Change active decoder.
   EXPECT_EQ(DecoderDatabase::kOK, db.SetActiveDecoder(103, &changed));
   EXPECT_TRUE(changed);
   decoder = db.GetActiveDecoder();
-  ASSERT_FALSE(decoder == NULL);  // Should get a decoder here.
+  ASSERT_FALSE(decoder == nullptr);  // Should get a decoder here.
 
-  // Remove the active decoder, and verify that the active becomes NULL.
+  // Remove the active decoder, and verify that the active becomes null.
   EXPECT_EQ(DecoderDatabase::kOK, db.Remove(103));
-  EXPECT_EQ(NULL, db.GetActiveDecoder());
+  EXPECT_EQ(nullptr, db.GetActiveDecoder());
 
   // Set active CNG codec.
   EXPECT_EQ(DecoderDatabase::kOK, db.SetActiveCngDecoder(13));
   ComfortNoiseDecoder* cng = db.GetActiveCngDecoder();
-  ASSERT_FALSE(cng == NULL);  // Should get a decoder here.
+  ASSERT_FALSE(cng == nullptr);  // Should get a decoder here.
 
-  // Remove the active CNG decoder, and verify that the active becomes NULL.
+  // Remove the active CNG decoder, and verify that the active becomes null.
   EXPECT_EQ(DecoderDatabase::kOK, db.Remove(13));
-  EXPECT_EQ(NULL, db.GetActiveCngDecoder());
+  EXPECT_EQ(nullptr, db.GetActiveCngDecoder());
 
   // Try to set non-existing codecs as active.
   EXPECT_EQ(DecoderDatabase::kDecoderNotFound,