Fix chromium-style warnings in webrtc/sound/.

webrtc/sound/soundoutputstreaminterface.cc

Index: webrtc/sound/soundoutputstreaminterface.cc
diff --git a/webrtc/base/asyncresolverinterface.cc b/webrtc/sound/soundoutputstreaminterface.cc
similarity index 68%
copy from webrtc/base/asyncresolverinterface.cc
copy to webrtc/sound/soundoutputstreaminterface.cc
index 7ee02f153ee6b93f8f3cffbd8d4a24653869ad8c..c40f1d70d97ea688e7def0dc60b45b2e000b749d 100644
--- a/webrtc/base/asyncresolverinterface.cc
+++ b/webrtc/sound/soundoutputstreaminterface.cc
@@ -8,13 +8,12 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#include "webrtc/base/asyncresolverinterface.h"
+#include "webrtc/sound/soundoutputstreaminterface.h"
 
 namespace rtc {
 
-AsyncResolverInterface::AsyncResolverInterface() {
-}
+SoundOutputStreamInterface::~SoundOutputStreamInterface() {}
 
-AsyncResolverInterface::~AsyncResolverInterface() = default;
+SoundOutputStreamInterface::SoundOutputStreamInterface() {}
 
-};  // namespace rtc
+}  // namespace rtc