Remove timing dependent packet checks from socket tests.

webrtc/base/testclient.cc

Index: webrtc/base/testclient.cc
diff --git a/webrtc/base/testclient.cc b/webrtc/base/testclient.cc
index fbb4f0cdf33b138a59f34ebe95898c8a74e05b89..fcf64e7d6210356f368343eb3a2cff5a141c4cc9 100644
--- a/webrtc/base/testclient.cc
+++ b/webrtc/base/testclient.cc
@@ -105,21 +105,12 @@ bool TestClient::CheckTimestamp(int64_t packet_timestamp) {
   if (packet_timestamp == -1) {
     res = false;
   }
-  int64_t time_us = rtc::TimeMicros();
   if (prev_packet_timestamp_ != -1) {
     if (packet_timestamp < prev_packet_timestamp_) {
       res = false;
     }
-    const int64_t kErrorMarginUs = 20000;
-    if (packet_timestamp - prev_packet_timestamp_ <
-            time_us - prev_time_us_ - kErrorMarginUs ||
-        packet_timestamp - prev_packet_timestamp_ >
-            time_us - prev_time_us_ + kErrorMarginUs) {
-      res = false;
-    }
   }
   prev_packet_timestamp_ = packet_timestamp;
-  prev_time_us_ = time_us;
   return res;
 }