Conver DLOG(INFO) to DVLOG(1) in QUIC code.

net/quic/quic_client_session.cc

Index: net/quic/quic_client_session.cc
diff --git a/net/quic/quic_client_session.cc b/net/quic/quic_client_session.cc
index e3d29bb8f693e5816c47cc9a9fb9ca02636e85aa..a4bf7438b712a573f685097dc1cc8756b8fadbda 100644
--- a/net/quic/quic_client_session.cc
+++ b/net/quic/quic_client_session.cc
@@ -186,12 +186,12 @@ int QuicClientSession::TryCreateStream(StreamRequest* request,
   }
 
   if (goaway_received()) {
-    DLOG(INFO) << "Going away.";
+    DVLOG(1) << "Going away.";
     return ERR_CONNECTION_CLOSED;
   }
 
   if (!connection()->connected()) {
-    DLOG(INFO) << "Already closed.";
+    DVLOG(1) << "Already closed.";
     return ERR_CONNECTION_CLOSED;
   }
 
@@ -216,16 +216,16 @@ void QuicClientSession::CancelRequest(StreamRequest* request) {
 
 QuicReliableClientStream* QuicClientSession::CreateOutgoingReliableStream() {
   if (!crypto_stream_->encryption_established()) {
-    DLOG(INFO) << "Encryption not active so no outgoing stream created.";
+    DVLOG(1) << "Encryption not active so no outgoing stream created.";
     return NULL;
   }
   if (GetNumOpenStreams() >= get_max_open_streams()) {
-    DLOG(INFO) << "Failed to create a new outgoing stream. "
+    DVLOG(1) << "Failed to create a new outgoing stream. "
                << "Already " << GetNumOpenStreams() << " open.";
     return NULL;
   }
   if (goaway_received()) {
-    DLOG(INFO) << "Failed to create a new outgoing stream. "
+    DVLOG(1) << "Failed to create a new outgoing stream. "
                << "Already received goaway.";
     return NULL;
   }
@@ -473,7 +473,7 @@ void QuicClientSession::OnReadComplete(int result) {
     result = ERR_CONNECTION_CLOSED;
 
   if (result < 0) {
-    DLOG(INFO) << "Closing session on read error: " << result;
+    DVLOG(1) << "Closing session on read error: " << result;
     UMA_HISTOGRAM_SPARSE_SLOWLY("Net.QuicSession.ReadError", -result);
     NotifyFactoryOfSessionGoingAway();
     CloseSessionOnErrorInner(result, QUIC_PACKET_READ_ERROR);