Major Description
FetchSM sees non-zero content length in the headers and waits incorrectly for the body until a timeout occurs. If it's a HEAD method, FetchSM should immediately send BODY_DONE to spdy to end the stream.
9.4 HEAD The HEAD method is identical to GET except that the server MUST NOT return a message-body in the response. The metainformation contained in the HTTP headers in response to a HEAD request SHOULD be identical to the information sent in response to a GET request. This method can be used for obtaining metainformation about the entity implied by the request without transferring the entity-body itself. This method is often used for testing hypertext links for validity, accessibility, and recent modification.