Deprecate HTTP/2 PAD_HIGH field and enforce max padding size to 256 octets.

net/spdy/spdy_protocol.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/spdy/spdy_protocol.h"
 
 namespace net {
 
 SpdyFrameWithNameValueBlockIR::SpdyFrameWithNameValueBlockIR(
     SpdyStreamId stream_id) : SpdyFrameWithFinIR(stream_id) {}
 
 SpdyFrameWithNameValueBlockIR::~SpdyFrameWithNameValueBlockIR() {}
 
 SpdyDataIR::SpdyDataIR(SpdyStreamId stream_id, const base::StringPiece& data)
     : SpdyFrameWithFinIR(stream_id),
-      pad_low_(false),
-      pad_high_(false),
+      padded_(false),
       padding_payload_len_(0) {
   SetDataDeep(data);
 }
 
 SpdyDataIR::SpdyDataIR(SpdyStreamId stream_id)
     : SpdyFrameWithFinIR(stream_id),
-      pad_low_(false),
-      pad_high_(false),
+      padded_(false),
       padding_payload_len_(0) {}
 
 SpdyDataIR::~SpdyDataIR() {}
 
 bool SpdyConstants::IsValidFrameType(SpdyMajorVersion version,
                                      int frame_type_field) {
   switch (version) {
     case SPDY2:
     case SPDY3:
       // SYN_STREAM is the first valid frame.
@@ skipping 798 matching lines @@
       parent_stream_id_(parent_stream_id),
       weight_(weight),
       exclusive_(exclusive) {
 }
 
 void SpdyPriorityIR::Visit(SpdyFrameVisitor* visitor) const {
   return visitor->VisitPriority(*this);
 }
 
 }  // namespace net