Move QUIC error code utility methods to quic_error_codes.{h,cc}, and rename them slightly. No beha…

net/quic/core/quic_stream_sequencer.cc

Index: net/quic/core/quic_stream_sequencer.cc
diff --git a/net/quic/core/quic_stream_sequencer.cc b/net/quic/core/quic_stream_sequencer.cc
index c0ab7028f1322c10ae099bfc67b832ecb1800dfa..f0b80a7ad9e3ce5d4fcb560100e83158972931f5 100644
--- a/net/quic/core/quic_stream_sequencer.cc
+++ b/net/quic/core/quic_stream_sequencer.cc
@@ -60,10 +60,10 @@ void QuicStreamSequencer::OnStreamFrame(const QuicStreamFrame& frame) {
       clock_->ApproximateNow(), &bytes_written, &error_details);
   if (result != QUIC_NO_ERROR) {
     string details = "Stream" + base::Uint64ToString(stream_->id()) + ": " +
-                     QuicUtils::ErrorToString(result) + ": " + error_details +
+                     QuicErrorCodeToString(result) + ": " + error_details +
                      "\nPeer Address: " +
                      stream_->PeerAddressOfLatestPacket().ToString();
-    DLOG(WARNING) << QuicUtils::ErrorToString(result);
+    DLOG(WARNING) << QuicErrorCodeToString(result);
     DLOG(WARNING) << details;
     stream_->CloseConnectionWithDetails(result, details);
     return;