Read recv timestamps from socket (posix only).

webrtc/base/socket_unittest.h

Index: webrtc/base/socket_unittest.h
diff --git a/webrtc/base/socket_unittest.h b/webrtc/base/socket_unittest.h
index adc69f1465d5dfdc74f95a635f3f278b89aced45..41f0a653cb8c9b900ad2ca74d53016676f924bb4 100644
--- a/webrtc/base/socket_unittest.h
+++ b/webrtc/base/socket_unittest.h
@@ -57,6 +57,7 @@ class SocketTest : public testing::Test {
   void TestUdpReadyToSendIPv6();
   void TestGetSetOptionsIPv4();
   void TestGetSetOptionsIPv6();
+  void TestSocketRecvTimestamp();
 
   static const int kTimeout = 5000;  // ms
   const IPAddress kIPv4Loopback;
@@ -84,6 +85,7 @@ class SocketTest : public testing::Test {
   void UdpInternal(const IPAddress& loopback);
   void UdpReadyToSend(const IPAddress& loopback);
   void GetSetOptionsInternal(const IPAddress& loopback);
+  void SocketRecvTimestamp(const IPAddress& loopback);
 
   SocketServer* ss_;
 };