Move CrxFile, FileReader, ExtensionResource to src/extensions.

chrome/browser/extensions/crx_file.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 "chrome/browser/extensions/crx_file.h"
-
-namespace extensions {
-
-namespace {
-
-// The current version of the crx format.
-static const uint32 kCurrentVersion = 2;
-
-// The maximum size the crx parser will tolerate for a public key.
-static const uint32 kMaxPublicKeySize = 1 << 16;
-
-// The maximum size the crx parser will tolerate for a signature.
-static const uint32 kMaxSignatureSize = 1 << 16;
-
-}  // namespace
-
-// The magic string embedded in the header.
-const char kCrxFileHeaderMagic[] = "Cr24";
-
-scoped_ptr<CrxFile> CrxFile::Parse(const CrxFile::Header& header,
-                                   CrxFile::Error* error) {
-  if (HeaderIsValid(header, error))
-    return scoped_ptr<CrxFile>(new CrxFile(header));
-  return scoped_ptr<CrxFile>();
-}
-
-scoped_ptr<CrxFile> CrxFile::Create(const uint32 key_size,
-                                    const uint32 signature_size,
-                                    CrxFile::Error* error) {
-  CrxFile::Header header;
-  memcpy(&header.magic, kCrxFileHeaderMagic, kCrxFileHeaderMagicSize);
-  header.version = kCurrentVersion;
-  header.key_size = key_size;
-  header.signature_size = signature_size;
-  if (HeaderIsValid(header, error))
-    return scoped_ptr<CrxFile>(new CrxFile(header));
-  return scoped_ptr<CrxFile>();
-}
-
-CrxFile::CrxFile(const Header& header) : header_(header) {
-}
-
-bool CrxFile::HeaderIsValid(const CrxFile::Header& header,
-                            CrxFile::Error* error) {
-  bool valid = false;
-  if (strncmp(kCrxFileHeaderMagic, header.magic, sizeof(header.magic)))
-    *error = kWrongMagic;
-  else if (header.version != kCurrentVersion)
-    *error = kInvalidVersion;
-  else if (header.key_size > kMaxPublicKeySize)
-    *error = kInvalidKeyTooLarge;
-  else if (header.key_size == 0)
-    *error = kInvalidKeyTooSmall;
-  else if (header.signature_size > kMaxSignatureSize)
-    *error = kInvalidSignatureTooLarge;
-  else if (header.signature_size == 0)
-    *error = kInvalidSignatureTooSmall;
-  else
-    valid = true;
-  return valid;
-}
-
-}  // namespace extensions