Removed the issue with the leading semicolon in the audio processing module experiment description…

webrtc/modules/audio_processing/echo_cancellation_impl.cc

Index: webrtc/modules/audio_processing/echo_cancellation_impl.cc
diff --git a/webrtc/modules/audio_processing/echo_cancellation_impl.cc b/webrtc/modules/audio_processing/echo_cancellation_impl.cc
index c18ed94bd2c1b97bb4157e610c647149bab41560..12527fc118e2a2dbdcf6cd6d903870499f88cb72 100644
--- a/webrtc/modules/audio_processing/echo_cancellation_impl.cc
+++ b/webrtc/modules/audio_processing/echo_cancellation_impl.cc
@@ -417,7 +417,10 @@ std::string EchoCancellationImpl::GetExperimentsDescription() {
   rtc::CritScope cs(crit_capture_);
   std::string description = (aec3_enabled_ ? "AEC3" : "");
   if (refined_adaptive_filter_enabled_) {
-    description += ";RefinedAdaptiveFilter";
+    if (description.size() > 0) {

[hlundin-webrtc, 2016/04/19 06:49:33]

Isn't it better to have a semi-colon separated list that always ends the last
item with a semi-colon? That way, each component would just have to make sure to
add a semi-colon after the string(s) it inserts. And if it inserts nothing, no
semi-colon is added either.

[peah-webrtc, 2016/04/19 07:55:12]

Awesome variant! :-).

Done.

+      description += ";";
+    }
+    description += "RefinedAdaptiveFilter";
   }
   return description;
 }