HttpStreamParser: Don't reuse sockets which receive unparsed data.

net/http/http_stream_parser.h

Index: net/http/http_stream_parser.h
diff --git a/net/http/http_stream_parser.h b/net/http/http_stream_parser.h
index b8bb23a20737d482bdb39b326bc913f56306ecca..ca3fd567f5c1e7698e22c6b16b86687a3485188f 100644
--- a/net/http/http_stream_parser.h
+++ b/net/http/http_stream_parser.h
@@ -223,10 +223,7 @@ class NET_EXPORT_PRIVATE HttpStreamParser {
   // The amount of sent data.
   int64_t sent_bytes_;
 
-  // The parsed response headers.  Owned by the caller of SendRequest.  This
-  // cannot be safely accessed after reading the final set of headers, as the
-  // caller of SendRequest may have been destroyed - this happens in the case an
-  // HttpResponseBodyDrainer is used.
+  // The parsed response headers.  Owned by the caller of SendRequest.
   HttpResponseInfo* response_;
 
   // Indicates the content length.  If this value is less than zero