Using buffered signal to calculate the level of echo cancellation.

webrtc/modules/audio_processing/test/audio_processing_unittest.cc

Index: webrtc/modules/audio_processing/test/audio_processing_unittest.cc
diff --git a/webrtc/modules/audio_processing/test/audio_processing_unittest.cc b/webrtc/modules/audio_processing/test/audio_processing_unittest.cc
index 1b371204560e5b1af9f8c48ae2da3d230023be28..667ed2aafcae3a7b69c188bf1815a560984225bf 100644
--- a/webrtc/modules/audio_processing/test/audio_processing_unittest.cc
+++ b/webrtc/modules/audio_processing/test/audio_processing_unittest.cc
@@ -203,10 +203,10 @@ int16_t MaxAudioFrame(const AudioFrame& frame) {
 #if defined(WEBRTC_AUDIOPROC_FLOAT_PROFILE)
 void TestStats(const AudioProcessing::Statistic& test,
                const audioproc::Test::Statistic& reference) {
-  EXPECT_EQ(reference.instant(), test.instant);
+  EXPECT_NEAR(reference.instant(), test.instant, 1);
   EXPECT_EQ(reference.average(), test.average);
   EXPECT_EQ(reference.maximum(), test.maximum);
-  EXPECT_EQ(reference.minimum(), test.minimum);
+  EXPECT_NEAR(reference.minimum(), test.minimum, 1);
 }
 
 void WriteStatsMessage(const AudioProcessing::Statistic& output,