Moves QuicTag typedefs, and QuicTag utility methods to quic_tag.{h,cc}. No behavior change.

net/quic/core/quic_config.cc

Index: net/quic/core/quic_config.cc
diff --git a/net/quic/core/quic_config.cc b/net/quic/core/quic_config.cc
index 784add587329a3858d5828bf338fdbe4d4d00a0c..0c5b5f9bf17eab00b62d4b4e207dec88b76f4c38 100644
--- a/net/quic/core/quic_config.cc
+++ b/net/quic/core/quic_config.cc
@@ -32,7 +32,7 @@ QuicErrorCode ReadUint32(const CryptoHandshakeMessage& msg,
   switch (error) {
     case QUIC_CRYPTO_MESSAGE_PARAMETER_NOT_FOUND:
       if (presence == PRESENCE_REQUIRED) {
-        *error_details = "Missing " + QuicUtils::TagToString(tag);
+        *error_details = "Missing " + QuicTagToString(tag);
         break;
       }
       error = QUIC_NO_ERROR;
@@ -41,7 +41,7 @@ QuicErrorCode ReadUint32(const CryptoHandshakeMessage& msg,
     case QUIC_NO_ERROR:
       break;
     default:
-      *error_details = "Bad " + QuicUtils::TagToString(tag);
+      *error_details = "Bad " + QuicTagToString(tag);
       break;
   }
   return error;
@@ -104,8 +104,7 @@ QuicErrorCode QuicNegotiableUint32::ProcessPeerHello(
     return error;
   }
   if (hello_type == SERVER && value > max_value_) {
-    *error_details =
-        "Invalid value received for " + QuicUtils::TagToString(tag_);
+    *error_details = "Invalid value received for " + QuicTagToString(tag_);
     return QUIC_INVALID_NEGOTIATED_VALUE;
   }
 
@@ -126,7 +125,7 @@ bool QuicFixedUint32::HasSendValue() const {
 
 uint32_t QuicFixedUint32::GetSendValue() const {
   QUIC_BUG_IF(!has_send_value_) << "No send value to get for tag:"
-                                << QuicUtils::TagToString(tag_);
+                                << QuicTagToString(tag_);
   return send_value_;
 }
 
@@ -141,7 +140,7 @@ bool QuicFixedUint32::HasReceivedValue() const {
 
 uint32_t QuicFixedUint32::GetReceivedValue() const {
   QUIC_BUG_IF(!has_receive_value_) << "No receive value to get for tag:"
-                                   << QuicUtils::TagToString(tag_);
+                                   << QuicTagToString(tag_);
   return receive_value_;
 }
 
@@ -167,13 +166,13 @@ QuicErrorCode QuicFixedUint32::ProcessPeerHello(
       if (presence_ == PRESENCE_OPTIONAL) {
         return QUIC_NO_ERROR;
       }
-      *error_details = "Missing " + QuicUtils::TagToString(tag_);
+      *error_details = "Missing " + QuicTagToString(tag_);
       break;
     case QUIC_NO_ERROR:
       has_receive_value_ = true;
       break;
     default:
-      *error_details = "Bad " + QuicUtils::TagToString(tag_);
+      *error_details = "Bad " + QuicTagToString(tag_);
       break;
   }
   return error;
@@ -196,7 +195,7 @@ bool QuicFixedTagVector::HasSendValues() const {
 
 QuicTagVector QuicFixedTagVector::GetSendValues() const {
   QUIC_BUG_IF(!has_send_values_) << "No send values to get for tag:"
-                                 << QuicUtils::TagToString(tag_);
+                                 << QuicTagToString(tag_);
   return send_values_;
 }
 
@@ -211,7 +210,7 @@ bool QuicFixedTagVector::HasReceivedValues() const {
 
 QuicTagVector QuicFixedTagVector::GetReceivedValues() const {
   QUIC_BUG_IF(!has_receive_values_) << "No receive value to get for tag:"
-                                    << QuicUtils::TagToString(tag_);
+                                    << QuicTagToString(tag_);
   return receive_values_;
 }
 
@@ -240,7 +239,7 @@ QuicErrorCode QuicFixedTagVector::ProcessPeerHello(
       if (presence_ == PRESENCE_OPTIONAL) {
         return QUIC_NO_ERROR;
       }
-      *error_details = "Missing " + QuicUtils::TagToString(tag_);
+      *error_details = "Missing " + QuicTagToString(tag_);
       break;
     case QUIC_NO_ERROR:
       DVLOG(1) << "Received Connection Option tags from receiver.";
@@ -250,7 +249,7 @@ QuicErrorCode QuicFixedTagVector::ProcessPeerHello(
       }
       break;
     default:
-      *error_details = "Bad " + QuicUtils::TagToString(tag_);
+      *error_details = "Bad " + QuicTagToString(tag_);
       break;
   }
   return error;
@@ -270,7 +269,7 @@ bool QuicFixedIPEndPoint::HasSendValue() const {
 
 const IPEndPoint& QuicFixedIPEndPoint::GetSendValue() const {
   QUIC_BUG_IF(!has_send_value_) << "No send value to get for tag:"
-                                << QuicUtils::TagToString(tag_);
+                                << QuicTagToString(tag_);
   return send_value_;
 }
 
@@ -285,7 +284,7 @@ bool QuicFixedIPEndPoint::HasReceivedValue() const {
 
 const IPEndPoint& QuicFixedIPEndPoint::GetReceivedValue() const {
   QUIC_BUG_IF(!has_receive_value_) << "No receive value to get for tag:"
-                                   << QuicUtils::TagToString(tag_);
+                                   << QuicTagToString(tag_);
   return receive_value_;
 }
 
@@ -309,7 +308,7 @@ QuicErrorCode QuicFixedIPEndPoint::ProcessPeerHello(
   base::StringPiece address;
   if (!peer_hello.GetStringPiece(tag_, &address)) {
     if (presence_ == PRESENCE_REQUIRED) {
-      *error_details = "Missing " + QuicUtils::TagToString(tag_);
+      *error_details = "Missing " + QuicTagToString(tag_);
       return QUIC_CRYPTO_MESSAGE_PARAMETER_NOT_FOUND;
     }
   } else {