Move CT EV white list packaging API from chrome/ to components/.

chrome/browser/net/bit_stream_reader.cc

-// Copyright 2014 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 "chrome/browser/net/bit_stream_reader.h"
-
-#include "base/big_endian.h"
-#include "base/logging.h"
-#include "base/numerics/safe_conversions.h"
-
-namespace internal {
-
-BitStreamReader::BitStreamReader(const base::StringPiece& source)
-    : source_(source), current_byte_(0), current_bit_(7) {
-  DCHECK_LT(source_.length(), UINT32_MAX);
-}
-
-bool BitStreamReader::ReadUnaryEncoding(uint64_t* out) {
-  if (BitsLeft() == 0)
-    return false;
-
-  *out = 0;
-  while ((BitsLeft() > 0) && ReadBit())
-    ++(*out);
-
-  return true;
-}
-
-bool BitStreamReader::ReadBits(uint8_t num_bits, uint64_t* out) {
-  DCHECK_LE(num_bits, 64);
-
-  if (BitsLeft() < num_bits)
-    return false;
-
-  *out = 0;
-  for (uint8_t i = 0; i < num_bits; ++i)
-    (*out) |= (static_cast<uint64_t>(ReadBit()) << (num_bits - (i + 1)));
-
-  return true;
-}
-
-uint64_t BitStreamReader::BitsLeft() const {
-  if (current_byte_ == source_.length())
-    return 0;
-  DCHECK_GT(source_.length(), current_byte_);
-  return (source_.length() - (current_byte_ + 1)) * 8 + current_bit_ + 1;
-}
-
-uint8_t BitStreamReader::ReadBit() {
-  DCHECK_GT(BitsLeft(), 0u);
-  DCHECK(current_bit_ < 8 && current_bit_ >= 0);
-  uint8_t res =
-      (source_.data()[current_byte_] & (1 << current_bit_)) >> current_bit_;
-  current_bit_--;
-  if (current_bit_ < 0) {
-    current_byte_++;
-    current_bit_ = 7;
-  }
-
-  return res;
-}
-
-}  // namespace internal