Make QuicSimpleServerStream supports multipart response body

components/cronet/android/cronet_bidirectional_stream_adapter.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cronet_bidirectional_stream_adapter.h"
 
 #include <string>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 170 matching lines @@
   // Get http status code from response headers.
   jint http_status_code = 0;
   const auto http_status_header = response_headers.find(":status");
   if (http_status_header != response_headers.end())
     base::StringToInt(http_status_header->second, &http_status_code);
 
   std::string protocol;
   switch (bidi_stream_->GetProtocol()) {
     case net::kProtoHTTP2:
       protocol = "h2";
+      break;
+    case net::kProtoQUIC1SPDY3:
+      protocol = "quic/1+spdy/3";
+      break;
     default:
       break;
   }
 
   cronet::Java_CronetBidirectionalStream_onResponseHeadersReceived(
       env, owner_.obj(), http_status_code,
       ConvertUTF8ToJavaString(env, protocol).obj(),
       GetHeadersArray(env, response_headers).obj(),
       bidi_stream_->GetTotalReceivedBytes());
 }
@@ skipping 104 matching lines @@
 
   std::vector<std::string> headers;
   for (const auto& header : header_block) {
     headers.push_back(header.first.as_string());
     headers.push_back(header.second.as_string());
   }
   return base::android::ToJavaArrayOfStrings(env, headers);
 }
 
 }  // namespace cronet