Change the QuicInMemoryCache to store a SpdyHeaderBlock instead of BalsaHeaders.

net/tools/quic/quic_spdy_server_stream.cc

Index: net/tools/quic/quic_spdy_server_stream.cc
diff --git a/net/tools/quic/quic_spdy_server_stream.cc b/net/tools/quic/quic_spdy_server_stream.cc
index 5937d6d6253a50e3024fb81d20e5f3fa1f06309e..9e07a788f694659e1bb0a2081cce3122e4d70f51 100644
--- a/net/tools/quic/quic_spdy_server_stream.cc
+++ b/net/tools/quic/quic_spdy_server_stream.cc
@@ -4,7 +4,6 @@
 
 #include "net/tools/quic/quic_spdy_server_stream.h"
 
-#include "base/memory/singleton.h"
 #include "net/quic/quic_session.h"
 #include "net/spdy/spdy_framer.h"
 #include "net/tools/quic/quic_in_memory_cache.h"
@@ -122,25 +121,22 @@ void QuicSpdyServerStream::SendResponse() {
 
 void QuicSpdyServerStream::SendErrorResponse() {
   DVLOG(1) << "Sending error response for stream " << id();
-  BalsaHeaders headers;
-  headers.SetResponseFirstlineFromStringPieces(
-      "HTTP/1.1", "500", "Server Error");
-  headers.ReplaceOrAppendHeader("content-length", "3");
+  SpdyHeaderBlock headers;
+  headers[":version"] = "HTTP/1.1";
+  headers[":status"] = "500 Server Error";
+  headers["content-length"] = "3";
   SendHeadersAndBody(headers, "bad");
 }
 
 void QuicSpdyServerStream::SendHeadersAndBody(
-    const BalsaHeaders& response_headers,
+    const SpdyHeaderBlock& response_headers,
     StringPiece body) {
   // We only support SPDY and HTTP, and neither handles bidirectional streaming.
   if (!read_side_closed()) {
     CloseReadSide();
   }
 
-  SpdyHeaderBlock header_block =
-      SpdyUtils::ResponseHeadersToSpdyHeaders(response_headers);
-
-  WriteHeaders(header_block, body.empty(), nullptr);
+  WriteHeaders(response_headers, body.empty(), nullptr);
 
   if (!body.empty()) {
     WriteOrBufferData(body, true, nullptr);