Add a method to inform AudioProcessing that its output will be muted.

R=turaj@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/8559004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@5538 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/webrtc/modules/audio_processing/audio_processing_impl.cc b/webrtc/modules/audio_processing/audio_processing_impl.cc
index 3ca90a7..fd2316c 100644
--- a/webrtc/modules/audio_processing/audio_processing_impl.cc
+++ b/webrtc/modules/audio_processing/audio_processing_impl.cc
@@ -297,6 +297,14 @@
   return num_output_channels_;
 }
 
+void AudioProcessingImpl::set_output_will_be_muted(bool muted) {
+  output_will_be_muted_ = muted;
+}
+
+bool AudioProcessingImpl::output_will_be_muted() const {
+  return output_will_be_muted_;
+}
+
 int AudioProcessingImpl::MaybeInitializeLocked(int sample_rate_hz,
     int num_input_channels, int num_output_channels, int num_reverse_channels) {
   if (sample_rate_hz == sample_rate_hz_ &&