Deprecate remove_rewritelength flag.

net/spdy/core/spdy_frame_builder.h

 // 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.
 
 #ifndef NET_SPDY_CORE_SPDY_FRAME_BUILDER_H_
 #define NET_SPDY_CORE_SPDY_FRAME_BUILDER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 92 matching lines @@
   bool WriteUInt64(uint64_t value) {
     uint32_t upper = base::HostToNet32(static_cast<uint32_t>(value >> 32));
     uint32_t lower = base::HostToNet32(static_cast<uint32_t>(value));
     return (WriteBytes(&upper, sizeof(upper)) &&
             WriteBytes(&lower, sizeof(lower)));
   }
   bool WriteStringPiece16(const SpdyStringPiece& value);
   bool WriteStringPiece32(const SpdyStringPiece& value);
   bool WriteBytes(const void* data, uint32_t data_len);
 
-  // Update (in-place) the length field in the frame being built to reflect the
-  // given length.
-  // The framer parameter is used to determine version-specific location and
-  // size information of the length field to be written, and must be initialized
-  // with the correct version for the frame being written.
-  bool OverwriteLength(const SpdyFramer& framer, size_t length);
-
  private:
   FRIEND_TEST_ALL_PREFIXES(SpdyFrameBuilderTest, GetWritableBuffer);
   FRIEND_TEST_ALL_PREFIXES(SpdyFrameBuilderTest, GetWritableOutput);
   FRIEND_TEST_ALL_PREFIXES(SpdyFrameBuilderTest, GetWritableOutputNegative);
 
   // Populates this frame with a HTTP2 frame prefix with type and length
   // information.
   bool BeginNewFrameInternal(const SpdyFramer& framer,
                              uint8_t raw_frame_type,
                              uint8_t flags,
@@ skipping 16 matching lines @@
   // A buffer to be created whenever a new frame needs to be written. Used only
   // if |output_| is nullptr.
   std::unique_ptr<char[]> buffer_;
   // A pre-allocated buffer. If not-null, serialized frame data is written to
   // this buffer.
   ZeroCopyOutputBuffer* output_ = nullptr;  // Does not own.
 
   size_t capacity_;  // Allocation size of payload, set by constructor.
   size_t length_;    // Length of the latest frame in the buffer.
   size_t offset_;    // Position at which the latest frame begins.
-
-  // Remove all four below after
-  // FLAGS_chromium_http2_flag_remove_rewritelength deprecates.
-  const size_t kLengthFieldLength = 3;
-  char* start_of_current_frame_ = nullptr;
-  size_t bytes_of_length_written_in_first_block_ = kLengthFieldLength;
-  // In case length of a new frame is cross blocks.
-  char* start_of_current_frame_in_next_block_ = nullptr;
 };
 
 }  // namespace net
 
 #endif  // NET_SPDY_CORE_SPDY_FRAME_BUILDER_H_