Change to optimize QUIC's RetransmittableFrames::HasCryptoHandshake by

net/quic/quic_protocol.cc

Index: net/quic/quic_protocol.cc
diff --git a/net/quic/quic_protocol.cc b/net/quic/quic_protocol.cc
index 419820a8c1ceeb5d5a761e77924ae771ff4a8e0c..66925ba1a15e041c59f5b894265ba80da63835fa 100644
--- a/net/quic/quic_protocol.cc
+++ b/net/quic/quic_protocol.cc
@@ -622,7 +622,8 @@ StringPiece QuicPacket::Plaintext() const {
 }
 
 RetransmittableFrames::RetransmittableFrames()
-    : encryption_level_(NUM_ENCRYPTION_LEVELS) {
+    : encryption_level_(NUM_ENCRYPTION_LEVELS),
+      has_crypto_handshake_(NOT_HANDSHAKE) {
 }
 
 RetransmittableFrames::~RetransmittableFrames() {
@@ -677,6 +678,9 @@ const QuicFrame& RetransmittableFrames::AddStreamFrame(
   stream_frame->data.Append(const_cast<char*>(stream_data_.back()->data()),
                             stream_data_.back()->size());
   frames_.push_back(QuicFrame(stream_frame));
+  if (stream_frame->stream_id == kCryptoStreamId) {
+    has_crypto_handshake_ = IS_HANDSHAKE;
+  }
   return frames_.back();
 }
 
@@ -687,16 +691,6 @@ const QuicFrame& RetransmittableFrames::AddNonStreamFrame(
   return frames_.back();
 }
 
-IsHandshake RetransmittableFrames::HasCryptoHandshake() const {
-  for (size_t i = 0; i < frames().size(); ++i) {
-    if (frames()[i].type == STREAM_FRAME &&
-        frames()[i].stream_frame->stream_id == kCryptoStreamId) {
-      return IS_HANDSHAKE;
-    }
-  }
-  return NOT_HANDSHAKE;
-}
-
 void RetransmittableFrames::set_encryption_level(EncryptionLevel level) {
   encryption_level_ = level;
 }