Delete DataLog abstraction, which was almost unused.

webrtc/modules/audio_coding/neteq/audio_decoder_unittest.cc

Index: webrtc/modules/audio_coding/neteq/audio_decoder_unittest.cc
diff --git a/webrtc/modules/audio_coding/neteq/audio_decoder_unittest.cc b/webrtc/modules/audio_coding/neteq/audio_decoder_unittest.cc
index 876a5ffb28b552ab3b9ca31c02e5e782b576c3a1..6b23a481803e8e9b4cf4cc5e9f494b9e5c6856ed 100644
--- a/webrtc/modules/audio_coding/neteq/audio_decoder_unittest.cc
+++ b/webrtc/modules/audio_coding/neteq/audio_decoder_unittest.cc
@@ -32,7 +32,6 @@
 #include "webrtc/modules/audio_coding/codecs/pcm16b/audio_decoder_pcm16b.h"
 #include "webrtc/modules/audio_coding/codecs/pcm16b/audio_encoder_pcm16b.h"
 #include "webrtc/modules/audio_coding/neteq/tools/resample_input_audio_file.h"
-#include "webrtc/system_wrappers/include/data_log.h"
 #include "webrtc/test/gtest.h"
 #include "webrtc/test/testsupport/fileutils.h"
 
@@ -53,9 +52,6 @@ void CompareInputOutput(const std::vector<int16_t>& input,
   for (unsigned int n = 0; n < num_samples - delay; ++n) {
     ASSERT_NEAR(input[n], output[channels * n + delay], tolerance)
         << "Exit test on first diff; n = " << n;
-    DataLog::InsertCell("CodecTest", "input", input[n]);
-    DataLog::InsertCell("CodecTest", "output", output[channels * n]);
-    DataLog::NextRow("CodecTest");
   }
 }
 
@@ -113,19 +109,11 @@ class AudioDecoderTest : public ::testing::Test {
       codec_input_rate_hz_ = audio_encoder_->SampleRateHz();
     // Create arrays.
     ASSERT_GT(data_length_, 0u) << "The test must set data_length_ > 0";
-    // Logging to view input and output in Matlab.
-    // Use 'gyp -Denable_data_logging=1' to enable logging.
-    DataLog::CreateLog();
-    DataLog::AddTable("CodecTest");
-    DataLog::AddColumn("CodecTest", "input", 1);
-    DataLog::AddColumn("CodecTest", "output", 1);
   }
 
   virtual void TearDown() {
     delete decoder_;
     decoder_ = NULL;
-    // Close log.
-    DataLog::ReturnLog();
   }
 
   virtual void InitEncoder() { }