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

net/http/http_stream_factory.h

Index: net/http/http_stream_factory.h
diff --git a/net/http/http_stream_factory.h b/net/http/http_stream_factory.h
index 231271dffe70cef2ab1c119b64e20d82bf8e8782..c03b8ca26e496a1c7852b817abeba993f3b46b14 100644
--- a/net/http/http_stream_factory.h
+++ b/net/http/http_stream_factory.h
@@ -33,6 +33,7 @@ namespace net {
 
 class AuthCredentials;
 class BoundNetLog;
+class BidirectionalStream;
 class HostMappingRules;
 class HostPortPair;
 class HttpAuthController;
@@ -84,6 +85,10 @@ class NET_EXPORT_PRIVATE HttpStreamRequest {
         const ProxyInfo& used_proxy_info,
         WebSocketHandshakeStreamBase* stream) = 0;
 
+    virtual void OnBidirectionalStreamReady(const SSLConfig& used_ssl_config,
+                                            const ProxyInfo& used_proxy_info,
+                                            BidirectionalStream* stream) = 0;
+
     // This is the failure to create a stream case.
     // |used_ssl_config| indicates the actual SSL configuration used for this
     // stream, since the HttpStreamRequest may have modified the configuration
@@ -222,6 +227,16 @@ class NET_EXPORT HttpStreamFactory {
       WebSocketHandshakeStreamBase::CreateHelper* create_helper,
       const BoundNetLog& net_log) = 0;
 
+  // Will call delegate->OnBidirectionalStreamReady on successful
+  // completion.
+  virtual HttpStreamRequest* RequestBidirectionalStream(
+      const HttpRequestInfo& info,
+      RequestPriority priority,
+      const SSLConfig& server_ssl_config,
+      const SSLConfig& proxy_ssl_config,
+      HttpStreamRequest::Delegate* delegate,
+      const BoundNetLog& net_log) = 0;
+
   // Requests that enough connections for |num_streams| be opened.
   virtual void PreconnectStreams(int num_streams,
                                  const HttpRequestInfo& info,