Fix bug in QuicHttpStream::SendRequest.

net/quic/quic_http_stream.cc

Index: net/quic/quic_http_stream.cc
diff --git a/net/quic/quic_http_stream.cc b/net/quic/quic_http_stream.cc
index 36eac6aee8ae1fffbf1c5d122c10ceae7c5ea891..664154abe189e156a0bd8fd80edcd5e39bfeaa93 100644
--- a/net/quic/quic_http_stream.cc
+++ b/net/quic/quic_http_stream.cc
@@ -102,12 +102,15 @@ void QuicHttpStream::OnStreamReady(int rv) {
 int QuicHttpStream::SendRequest(const HttpRequestHeaders& request_headers,
                                 HttpResponseInfo* response,
                                 const CompletionCallback& callback) {
-  CHECK(stream_);
   CHECK(!request_body_stream_);
   CHECK(!response_info_);
   CHECK(!callback.is_null());
   CHECK(response);
 
+   if (!stream_) {
+    return ERR_CONNECTION_CLOSED;
+  }
+
   QuicPriority priority = ConvertRequestPriorityToQuicPriority(priority_);
   stream_->set_priority(priority);
   // Store the serialized request headers.
@@ -352,6 +355,7 @@ void QuicHttpStream::OnCryptoHandshakeConfirmed() {
 }
 
 void QuicHttpStream::OnSessionClosed(int error) {
+  Close(false);
   session_error_ = error;
   session_.reset();
 }