Move data pack from base to app (it's just part of the resource bundle system...

base/data_pack.h

-// Copyright (c) 2008 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.
-
-// DataPack represents a read-only view onto an on-disk file that contains
-// (key, value) pairs of data.  It's used to store static resources like
-// translation strings and images.
-
-#ifndef BASE_DATA_PACK_H_
-#define BASE_DATA_PACK_H_
-#pragma once
-
-#include <map>
-
-#include "base/basictypes.h"
-#include "base/scoped_ptr.h"
-
-namespace file_util {
-  class MemoryMappedFile;
-}
-class FilePath;
-class RefCountedStaticMemory;
-
-namespace base {
-
-class StringPiece;
-
-class DataPack {
- public:
-  DataPack();
-  ~DataPack();
-
-  // Load a pack file from |path|, returning false on error.
-  bool Load(const FilePath& path);
-
-  // Get resource by id |resource_id|, filling in |data|.
-  // The data is owned by the DataPack object and should not be modified.
-  // Returns false if the resource id isn't found.
-  bool GetStringPiece(uint32 resource_id, StringPiece* data) const;
-
-  // Like GetStringPiece(), but returns a reference to memory. This interface
-  // is used for image data, while the StringPiece interface is usually used
-  // for localization strings.
-  RefCountedStaticMemory* GetStaticMemory(uint32 resource_id) const;
-
-  // Writes a pack file containing |resources| to |path|.
-  static bool WritePack(const FilePath& path,
-                        const std::map<uint32, StringPiece>& resources);
-
- private:
-  // The memory-mapped data.
-  scoped_ptr<file_util::MemoryMappedFile> mmap_;
-
-  // Number of resources in the data.
-  size_t resource_count_;
-
-  DISALLOW_COPY_AND_ASSIGN(DataPack);
-};
-
-}  // namespace base
-
-#endif  // BASE_DATA_PACK_H_