Let Contraints Controll Mute/Unmute Audio Local Playback For Desktop Sharing

third_party/WebKit/Source/platform/exported/WebMediaConstraints.cpp

Index: third_party/WebKit/Source/platform/exported/WebMediaConstraints.cpp
diff --git a/third_party/WebKit/Source/platform/exported/WebMediaConstraints.cpp b/third_party/WebKit/Source/platform/exported/WebMediaConstraints.cpp
index 2ef844e0002bb8293133364d89bd6f71d51cc582..c36269c30312cf03bcf7886142aabd51d015eb06 100644
--- a/third_party/WebKit/Source/platform/exported/WebMediaConstraints.cpp
+++ b/third_party/WebKit/Source/platform/exported/WebMediaConstraints.cpp
@@ -382,6 +382,7 @@ WebMediaTrackConstraintSet::WebMediaTrackConstraintSet()
     , latency("latency")
     , channelCount("channelCount")
     , deviceId("deviceId")
+    , disableLocalEcho("disableLocalEcho")
     , groupId("groupId")
     , mediaStreamSource("mediaStreamSource")
     , renderToAssociatedSink("chromeRenderToAssociatedSink")
@@ -430,8 +431,8 @@ std::vector<const BaseConstraint*> WebMediaTrackConstraintSet::allConstraints()
     const BaseConstraint* temp[] = {
         &width, &height, &aspectRatio, &frameRate, &facingMode, &volume,
         &sampleRate, &sampleSize, &echoCancellation, &latency, &channelCount,
-        &deviceId, &groupId, &mediaStreamSource, &renderToAssociatedSink,
-        &hotwordEnabled, &googEchoCancellation,
+        &deviceId, &groupId, &mediaStreamSource, &disableLocalEcho,
+        &renderToAssociatedSink, &hotwordEnabled, &googEchoCancellation,
         &googExperimentalEchoCancellation, &googAutoGainControl,
         &googExperimentalAutoGainControl, &googNoiseSuppression,
         &googHighpassFilter, &googTypingNoiseDetection,