Added a net::BidirectionalStream to expose a bidirectional streaming interface

net/http/http_network_transaction_unittest.cc

Index: net/http/http_network_transaction_unittest.cc
diff --git a/net/http/http_network_transaction_unittest.cc b/net/http/http_network_transaction_unittest.cc
index fb65846782a989cf59b6552d355c0dcf11ba9b53..4308e186367ad8f93db4beaff1ad0a577a10789d 100644
--- a/net/http/http_network_transaction_unittest.cc
+++ b/net/http/http_network_transaction_unittest.cc
@@ -13538,6 +13538,17 @@ class FakeStreamFactory : public HttpStreamFactory {
     return fake_request;
   }
 
+  HttpStreamRequest* RequestBidirectionalStream(
+      const HttpRequestInfo& info,
+      RequestPriority priority,
+      const SSLConfig& server_ssl_config,
+      const SSLConfig& proxy_ssl_config,
+      HttpStreamRequest::Delegate* delegate,
+      const BoundNetLog& net_log) override {
+    NOTREACHED();
+    return nullptr;
+  }
+
   HttpStreamRequest* RequestWebSocketHandshakeStream(
       const HttpRequestInfo& info,
       RequestPriority priority,