Finalized the SSE2 optimizations for the matched filter in AEC3

webrtc/modules/audio_processing/aec3/matched_filter_unittest.cc

Index: webrtc/modules/audio_processing/aec3/matched_filter_unittest.cc
diff --git a/webrtc/modules/audio_processing/aec3/matched_filter_unittest.cc b/webrtc/modules/audio_processing/aec3/matched_filter_unittest.cc
index 75b6b572b38513fe7f0bd8dd880dbc9b98307cbd..45965c7bbb775177b3b5bd33a5b9e4c1d7bf12fe 100644
--- a/webrtc/modules/audio_processing/aec3/matched_filter_unittest.cc
+++ b/webrtc/modules/audio_processing/aec3/matched_filter_unittest.cc
@@ -74,7 +74,7 @@ TEST(MatchedFilter, TestOptimizations) {
       EXPECT_NEAR(error_sum, error_sum_SSE2, error_sum / 100000.f);
 
       for (size_t j = 0; j < h.size(); ++j) {
-        EXPECT_NEAR(h[j], h_SSE2[j], 0.001f);
+        EXPECT_NEAR(h[j], h_SSE2[j], 0.00001f);
       }
 
       x_index = (x_index + kSubBlockSize) % x.size();