Add a reliability term to the echo detector.

webrtc/modules/audio_processing/residual_echo_detector_unittest.cc

Index: webrtc/modules/audio_processing/residual_echo_detector_unittest.cc
diff --git a/webrtc/modules/audio_processing/residual_echo_detector_unittest.cc b/webrtc/modules/audio_processing/residual_echo_detector_unittest.cc
index 9ba3bf4e401306f02312a673e6f8916a7c79e75e..0784a4f9f70ade107880ed06b2b505cd26c437c9 100644
--- a/webrtc/modules/audio_processing/residual_echo_detector_unittest.cc
+++ b/webrtc/modules/audio_processing/residual_echo_detector_unittest.cc
@@ -17,6 +17,7 @@ namespace webrtc {
 
 TEST(ResidualEchoDetectorTests, Echo) {
   ResidualEchoDetector echo_detector;
+  echo_detector.SetReliabilityForTest(1.0f);
   std::vector<float> ones(160, 1.f);
   std::vector<float> zeros(160, 0.f);
 
@@ -41,6 +42,7 @@ TEST(ResidualEchoDetectorTests, Echo) {
 
 TEST(ResidualEchoDetectorTests, NoEcho) {
   ResidualEchoDetector echo_detector;
+  echo_detector.SetReliabilityForTest(1.0f);
   std::vector<float> ones(160, 1.f);
   std::vector<float> zeros(160, 0.f);
 
@@ -60,6 +62,7 @@ TEST(ResidualEchoDetectorTests, NoEcho) {
 
 TEST(ResidualEchoDetectorTests, EchoWithRenderClockDrift) {
   ResidualEchoDetector echo_detector;
+  echo_detector.SetReliabilityForTest(1.0f);
   std::vector<float> ones(160, 1.f);
   std::vector<float> zeros(160, 0.f);
 
@@ -94,6 +97,7 @@ TEST(ResidualEchoDetectorTests, EchoWithRenderClockDrift) {
 
 TEST(ResidualEchoDetectorTests, EchoWithCaptureClockDrift) {
   ResidualEchoDetector echo_detector;
+  echo_detector.SetReliabilityForTest(1.0f);
   std::vector<float> ones(160, 1.f);
   std::vector<float> zeros(160, 0.f);