Utilizing the AEC3 config struct for constants.

webrtc/modules/audio_processing/aec3/suppression_gain_unittest.cc

Index: webrtc/modules/audio_processing/aec3/suppression_gain_unittest.cc
diff --git a/webrtc/modules/audio_processing/aec3/suppression_gain_unittest.cc b/webrtc/modules/audio_processing/aec3/suppression_gain_unittest.cc
index 61238d93d4a6d1f0732009e2c119ebca1f609f79..fbc72b0831a39c782433e2cce0eafd43ee2e2105 100644
--- a/webrtc/modules/audio_processing/aec3/suppression_gain_unittest.cc
+++ b/webrtc/modules/audio_processing/aec3/suppression_gain_unittest.cc
@@ -41,7 +41,8 @@ TEST(SuppressionGain, NullOutputGains) {
 
 // Does a sanity check that the gains are correctly computed.
 TEST(SuppressionGain, BasicGainComputation) {
-  SuppressionGain suppression_gain(DetectOptimization());
+  SuppressionGain suppression_gain(AudioProcessing::Config::EchoCanceller3(),
+                                   DetectOptimization());
   RenderSignalAnalyzer analyzer;
   float high_bands_gain;
   std::array<float, kFftLengthBy2Plus1> E2;