Only allow HTTP/0.9 support on default ports.

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 a70af6560fd0b283397c7916d2fc44236ba0926e..89d6baf6e033f9e75d37618494e47acbcff5d79f 100644
--- a/net/http/http_stream_parser.h
+++ b/net/http/http_stream_parser.h
@@ -50,6 +50,12 @@ class NET_EXPORT_PRIVATE HttpStreamParser {
                    const BoundNetLog& net_log);
   virtual ~HttpStreamParser();
 
+  // By default, HTTP/0.9 is only allowed on default ports. This enables it
+  // everwhere.
+  void set_http_09_on_non_default_ports_enabled() {

[eroman, 2016/08/29 22:11:55]

I think this would be clearer if it took a boolean parameter
(and the client of it simply calls it always, rather than conditionally).

[mmenke, 2016/08/30 17:50:47]

Done.  I didn't make it take a bool to emphasize its default value, but I'm
fine, either way.

+    http_09_on_non_default_ports_enabled_ = true;
+  }
+
   // These functions implement the interface described in HttpStream with
   // some additional functionality
   int SendRequest(const std::string& request_line,
@@ -209,6 +215,9 @@ class NET_EXPORT_PRIVATE HttpStreamParser {
   // |request_headers_| if the body was merged with the headers.
   int request_headers_length_;
 
+  // True if HTTP/0.9 should be permitted on non-default ports.
+  bool http_09_on_non_default_ports_enabled_;
+
   // Temporary buffer for reading.
   scoped_refptr<GrowableIOBuffer> read_buf_;