Revert of Add new HTTP/2 and HPACK decoder in net/http2/.

net/http2/decoder/decode_buffer.cc

Index: net/http2/decoder/decode_buffer.cc
diff --git a/net/http2/decoder/decode_buffer.cc b/net/http2/decoder/decode_buffer.cc
deleted file mode 100644
index 15235bae4b53db8bcc127f190aee6a5df70deba8..0000000000000000000000000000000000000000
--- a/net/http2/decoder/decode_buffer.cc
+++ /dev/null
@@ -1,90 +0,0 @@
-// Copyright 2016 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/http2/decoder/decode_buffer.h"
-
-namespace net {
-
-bool DecodeBuffer::SlowDecodeUnsignedInt(uint32_t field_size,
-                                         uint32_t field_offset,
-                                         uint32_t* decode_offset,
-                                         uint32_t* value) {
-  DCHECK_LT(0u, field_size);
-  DCHECK_LE(field_size, 4u);
-  DCHECK(decode_offset != nullptr);
-  DCHECK_LE(field_offset, *decode_offset);
-  const uint32_t next_field_offset = field_offset + field_size;
-  if (*decode_offset == field_offset) {
-    // Starting to decode field. It is possible we will reach this point
-    // twice, once when we've just exhausted the input, and once when
-    // resuming decoding with a new input buffer.
-    // Clear the field; we do NOT assume that the caller has done so
-    // previously.
-    *value = 0;
-  } else if (*decode_offset >= next_field_offset) {
-    // We already decoded this field.
-    return true;
-  }
-  do {
-    if (Empty()) {
-      return false;  // Not done decoding.
-    }
-    *value = *value << 8 | DecodeUInt8();
-    (*decode_offset)++;
-  } while (*decode_offset < next_field_offset);
-  return true;
-}
-
-bool DecodeBuffer::SlowDecodeUInt8(uint32_t field_offset,
-                                   uint32_t* decode_offset,
-                                   uint8_t* value) {
-  uint32_t tmp = *value;
-  const bool done = SlowDecodeUnsignedInt(1 /* field_size */, field_offset,
-                                          decode_offset, &tmp);
-  *value = tmp & 0xff;
-  DCHECK_EQ(tmp, *value);
-  return done;
-}
-
-bool DecodeBuffer::SlowDecodeUInt16(uint32_t field_offset,
-                                    uint32_t* decode_offset,
-                                    uint16_t* value) {
-  uint32_t tmp = *value;
-  const bool done = SlowDecodeUnsignedInt(2 /* field_size */, field_offset,
-                                          decode_offset, &tmp);
-  *value = tmp & 0xffff;
-  DCHECK_EQ(tmp, *value);
-  return done;
-}
-
-bool DecodeBuffer::SlowDecodeUInt24(uint32_t field_offset,
-                                    uint32_t* decode_offset,
-                                    uint32_t* value) {
-  uint32_t tmp = *value;
-  const bool done = SlowDecodeUnsignedInt(3 /* field_size */, field_offset,
-                                          decode_offset, &tmp);
-  *value = tmp & 0xffffff;
-  DCHECK_EQ(tmp, *value);
-  return done;
-}
-
-bool DecodeBuffer::SlowDecodeUInt31(uint32_t field_offset,
-                                    uint32_t* decode_offset,
-                                    uint32_t* value) {
-  uint32_t tmp = *value;
-  const bool done = SlowDecodeUnsignedInt(4 /* field_size */, field_offset,
-                                          decode_offset, &tmp);
-  *value = tmp & 0x7fffffff;
-  DCHECK_EQ(tmp & 0x7fffffff, *value);
-  return done;
-}
-
-bool DecodeBuffer::SlowDecodeUInt32(uint32_t field_offset,
-                                    uint32_t* decode_offset,
-                                    uint32_t* value) {
-  return SlowDecodeUnsignedInt(4 /* field_size */, field_offset, decode_offset,
-                               value);
-}
-
-}  // namespace net