Revert of Implement QUIC-based net::BidirectionalStream

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 f47ada13c7b5f8c8f74f5e343831037d380f73f8..359f7f0dbda25b97051b813786e7dca6c413b34e 100644
--- a/net/http/http_stream_factory.h
+++ b/net/http/http_stream_factory.h
@@ -54,12 +54,6 @@
 // which no callbacks will be invoked.
 class NET_EXPORT_PRIVATE HttpStreamRequest {
  public:
-  // Indicates which type of stream is requested.
-  enum StreamType {
-    BIDIRECTIONAL_STREAM,
-    HTTP_STREAM,
-  };
-
   // The HttpStreamRequest::Delegate is a set of callback methods for a
   // HttpStreamRequestJob.  Generally, only one of these methods will be
   // called as a result of a stream request.