Add a SpdyFramer extension API implementation.

net/spdy/spdy_frame_builder.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_frame_builder.h"
 
 #include <algorithm>
 #include <cstdint>
 #include <limits>
 
@@ skipping 113 matching lines @@
   return success;
 }
 
 bool SpdyFrameBuilder::BeginNewFrame(const SpdyFramer& framer,
                                      SpdyFrameType type,
                                      uint8_t flags,
                                      SpdyStreamId stream_id,
                                      size_t length) {
   uint8_t raw_frame_type = SerializeFrameType(type);
   DCHECK(IsDefinedFrameType(raw_frame_type));
+  return BeginNewFrameInternal(framer, raw_frame_type, flags, stream_id,
+                               length);
+}
+
+bool SpdyFrameBuilder::BeginNewExtensionFrame(const SpdyFramer& framer,
+                                              uint8_t raw_frame_type,
+                                              uint8_t flags,
+                                              SpdyStreamId stream_id,
+                                              size_t length) {
+  DCHECK(!IsDefinedFrameType(raw_frame_type));
+  return BeginNewFrameInternal(framer, raw_frame_type, flags, stream_id,
+                               length);
+}
+
+bool SpdyFrameBuilder::BeginNewFrameInternal(const SpdyFramer& framer,
+                                             uint8_t raw_frame_type,
+                                             uint8_t flags,
+                                             SpdyStreamId stream_id,
+                                             size_t length) {
   DCHECK_EQ(0u, stream_id & ~kStreamIdMask);
   bool success = true;
   SPDY_BUG_IF(framer.GetFrameMaximumSize() < length_)
       << "Frame length  " << length_
       << " is longer than the maximum allowed length.";
 
   offset_ += length_;
   length_ = 0;
 
   success &= WriteUInt24(length);
@@ skipping 108 matching lines @@
   } else {
     if (length > output_->BytesFree()) {
       return false;
     }
   }
 
   return true;
 }
 
 }  // namespace net