Ensures that WebRTC works for device selection using a different sample rate than default

content/public/common/media_stream_request.cc

Index: content/public/common/media_stream_request.cc
diff --git a/content/public/common/media_stream_request.cc b/content/public/common/media_stream_request.cc
index 016807c7d0c4ccac14c486c3db64bcb501ccb6b9..79d836fd84a4f8328457b99a7c3880038a525414 100644
--- a/content/public/common/media_stream_request.cc
+++ b/content/public/common/media_stream_request.cc
@@ -4,6 +4,8 @@
 
 #include "content/public/common/media_stream_request.h"
 
+#include "base/logging.h"
+
 namespace content {
 
 bool IsAudioMediaType(MediaStreamType type) {
@@ -24,7 +26,24 @@ MediaStreamDevice::MediaStreamDevice(
     const std::string& name)
     : type(type),
       id(id),
-      name(name) {
+      name(name),
+      sample_rate(0),
+      channel_layout(0) {
+  DCHECK(IsVideoMediaType(type));
+}
+
+MediaStreamDevice::MediaStreamDevice(
+    MediaStreamType type,
+    const std::string& id,
+    const std::string& name,
+    int sample_rate,
+    int channel_layout)
+    : type(type),
+      id(id),
+      name(name),
+      sample_rate(sample_rate),
+      channel_layout(channel_layout) {
+  DCHECK(IsAudioMediaType(type));
 }
 
 MediaStreamDevice::~MediaStreamDevice() {}