diff --git a/webrtc/modules/audio_coding/codecs/isac/fix/source/pitch_filter.c b/webrtc/modules/audio_coding/codecs/isac/fix/source/pitch_filter.c
index 89d884a0b..df961a7a4 100644
--- a/webrtc/modules/audio_coding/codecs/isac/fix/source/pitch_filter.c
+++ b/webrtc/modules/audio_coding/codecs/isac/fix/source/pitch_filter.c
@@ -27,11 +27,6 @@ static const int kSegments = 5;
 // A division factor of 1/5 in Q15.
 static const int16_t kDivFactor = 6553;
 
-// Filter coefficicients in Q15.
-static const int16_t kDampFilter[PITCH_DAMPORDER] = {
-  -2294, 8192, 20972, 8192, -2294
-};
-
 // Interpolation coefficients; generated by design_pitch_filter.m.
 // Coefficients are stored in Q14.
 static const int16_t kIntrpCoef[PITCH_FRACS][PITCH_FRACORDER] = {
diff --git a/webrtc/modules/audio_coding/main/acm2/acm_receiver.cc b/webrtc/modules/audio_coding/main/acm2/acm_receiver.cc
index d5acfac36..9c9f05d9b 100644
--- a/webrtc/modules/audio_coding/main/acm2/acm_receiver.cc
+++ b/webrtc/modules/audio_coding/main/acm2/acm_receiver.cc
@@ -32,7 +32,6 @@ namespace webrtc {
 
 namespace {
 
-const int kRtpHeaderSize = 12;
 const int kNeteqInitSampleRateHz = 16000;
 const int kNackThresholdPackets = 2;
 
diff --git a/webrtc/modules/audio_processing/aec/aec_core.c b/webrtc/modules/audio_processing/aec/aec_core.c
index d194c8269..deaf74aa2 100644
--- a/webrtc/modules/audio_processing/aec/aec_core.c
+++ b/webrtc/modules/audio_processing/aec/aec_core.c
@@ -31,9 +31,6 @@
 // Buffer size (samples)
 static const size_t kBufSizePartitions = 250;  // 1 second of audio in 16 kHz.
 
-// Noise suppression
-static const int converged = 250;
-
 // Metrics
 static const int subCountLen = 4;
 static const int countLen = 50;
diff --git a/webrtc/modules/audio_processing/aecm/aecm_core.c b/webrtc/modules/audio_processing/aecm/aecm_core.c
index db3551562..a44ce08da 100644
--- a/webrtc/modules/audio_processing/aecm/aecm_core.c
+++ b/webrtc/modules/audio_processing/aecm/aecm_core.c
@@ -44,6 +44,7 @@ static const ALIGN8_BEG int16_t WebRtcAecm_kSqrtHanning[] ALIGN8_END = {
 };
 #endif
 
+#ifdef AECM_WITH_ABS_APPROX
 //Q15 alpha = 0.99439986968132  const Factor for magnitude approximation
 static const uint16_t kAlpha1 = 32584;
 //Q15 beta = 0.12967166976970   const Factor for magnitude approximation
@@ -56,6 +57,7 @@ static const uint16_t kBeta2 = 11072;
 static const uint16_t kAlpha3 = 26951;
 //Q15 beta = 0.57762063060713   const Factor for magnitude approximation
 static const uint16_t kBeta3 = 18927;
+#endif
 
 // Initialization table for echo channel in 8 kHz
 static const int16_t kChannelStored8kHz[PART_LEN1] = {
diff --git a/webrtc/modules/remote_bitrate_estimator/rtp_to_ntp.cc b/webrtc/modules/remote_bitrate_estimator/rtp_to_ntp.cc
index 5ed38c9fc..109edae7c 100644
--- a/webrtc/modules/remote_bitrate_estimator/rtp_to_ntp.cc
+++ b/webrtc/modules/remote_bitrate_estimator/rtp_to_ntp.cc
@@ -18,8 +18,6 @@ namespace webrtc {
 
 namespace synchronization {
 
-const double kNtpFracPerMs = 4.294967296E6;
-
 RtcpMeasurement::RtcpMeasurement()
     : ntp_secs(0), ntp_frac(0), rtp_timestamp(0) {}
 
diff --git a/webrtc/modules/rtp_rtcp/source/rtcp_receiver.cc b/webrtc/modules/rtp_rtcp/source/rtcp_receiver.cc
index 9ab1fb69b..0771eba81 100644
--- a/webrtc/modules/rtp_rtcp/source/rtcp_receiver.cc
+++ b/webrtc/modules/rtp_rtcp/source/rtcp_receiver.cc
@@ -19,11 +19,6 @@
 #include "webrtc/system_wrappers/interface/trace.h"
 #include "webrtc/system_wrappers/interface/trace_event.h"
 
-namespace
-{
-    const float FRAC = 4.294967296E9;
-}
-
 namespace webrtc {
 using namespace RTCPUtility;
 using namespace RTCPHelp;
diff --git a/webrtc/modules/rtp_rtcp/source/rtp_rtcp_impl.cc b/webrtc/modules/rtp_rtcp/source/rtp_rtcp_impl.cc
index 7c4cee7e8..068b5cfe2 100644
--- a/webrtc/modules/rtp_rtcp/source/rtp_rtcp_impl.cc
+++ b/webrtc/modules/rtp_rtcp/source/rtp_rtcp_impl.cc
@@ -22,13 +22,6 @@
 extern MatlabEngine eng;  // Global variable defined elsewhere.
 #endif
 
-// Local for this file.
-namespace {
-
-const float kFracMs = 4.294967296E6f;
-
-}  // namespace
-
 #ifdef _WIN32
 // Disable warning C4355: 'this' : used in base member initializer list.
 #pragma warning(disable : 4355)
diff --git a/webrtc/video_engine/vie_capturer.cc b/webrtc/video_engine/vie_capturer.cc
index dd0f3177b..e380bc3a3 100644
--- a/webrtc/video_engine/vie_capturer.cc
+++ b/webrtc/video_engine/vie_capturer.cc
@@ -31,7 +31,6 @@
 namespace webrtc {
 
 const int kThreadWaitTimeMs = 100;
-const int kMaxDeliverWaitTime = 500;
 
 ViECapturer::ViECapturer(int capture_id,
                          int engine_id,
diff --git a/webrtc/video_engine/vie_remb.cc b/webrtc/video_engine/vie_remb.cc
index 578c0b479..6b0f161d9 100644
--- a/webrtc/video_engine/vie_remb.cc
+++ b/webrtc/video_engine/vie_remb.cc
@@ -22,7 +22,6 @@
 
 namespace webrtc {
 
-const int kRembTimeOutThresholdMs = 2000;
 const int kRembSendIntervallMs = 1000;
 const unsigned int kRembMinimumBitrateKbps = 50;