Move CrxFile, FileReader, ExtensionResource to src/extensions.

chrome/common/extensions/extension_resource.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 CHROME_COMMON_EXTENSIONS_EXTENSION_RESOURCE_H_
-#define CHROME_COMMON_EXTENSIONS_EXTENSION_RESOURCE_H_
-
-#include <string>
-
-#include "base/files/file_path.h"
-
-// Represents a resource inside an extension. For example, an image, or a
-// JavaScript file. This is more complicated than just a simple FilePath
-// because extension resources can come from multiple physical file locations
-// depending on locale.
-class ExtensionResource {
- public:
-  // SymlinkPolicy decides whether we'll allow resources to be a symlink to
-  // anywhere, or whether they must end up within the extension root.
-  enum SymlinkPolicy {
-    SYMLINKS_MUST_RESOLVE_WITHIN_ROOT,
-    FOLLOW_SYMLINKS_ANYWHERE,
-  };
-
-  ExtensionResource();
-
-  ExtensionResource(const std::string& extension_id,
-                    const base::FilePath& extension_root,
-                    const base::FilePath& relative_path);
-
-  ~ExtensionResource();
-
-  // set_follow_symlinks_anywhere allows the resource to be a symlink to
-  // anywhere in the filesystem. By default, resources have to be within
-  // |extension_root| after resolving symlinks.
-  void set_follow_symlinks_anywhere();
-
-  // Returns actual path to the resource (default or locale specific). In the
-  // browser process, this will DCHECK if not called on the file thread. To
-  // easily load extension images on the UI thread, see ImageLoader.
-  const base::FilePath& GetFilePath() const;
-
-  // Gets the physical file path for the extension resource, taking into account
-  // localization. In the browser process, this will DCHECK if not called on the
-  // file thread. To easily load extension images on the UI thread, see
-  // ImageLoader.
-  //
-  // The relative path must not resolve to a location outside of
-  // |extension_root|. Iff |file_can_symlink_outside_root| is true, then the
-  // file can be a symlink that links outside of |extension_root|.
-  static base::FilePath GetFilePath(const base::FilePath& extension_root,
-                                    const base::FilePath& relative_path,
-                                    SymlinkPolicy symlink_policy);
-
-  // Getters
-  const std::string& extension_id() const { return extension_id_; }
-  const base::FilePath& extension_root() const { return extension_root_; }
-  const base::FilePath& relative_path() const { return relative_path_; }
-
-  bool empty() const { return extension_root().empty(); }
-
-  // Unit test helpers.
-  base::FilePath::StringType NormalizeSeperators(
-      const base::FilePath::StringType& path) const;
-  bool ComparePathWithDefault(const base::FilePath& path) const;
-
- private:
-  // The id of the extension that this resource is associated with.
-  std::string extension_id_;
-
-  // Extension root.
-  base::FilePath extension_root_;
-
-  // Relative path to resource.
-  base::FilePath relative_path_;
-
-  // If |follow_symlinks_anywhere_| is true then the resource itself must be
-  // within |extension_root|, but it can be a symlink to a file that is not.
-  bool follow_symlinks_anywhere_;
-
-  // Full path to extension resource. Starts empty.
-  mutable base::FilePath full_resource_path_;
-};
-
-#endif  // CHROME_COMMON_EXTENSIONS_EXTENSION_RESOURCE_H_