Move CrxFile, FileReader, ExtensionResource to src/extensions.

extensions/common/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_
+#ifndef EXTENSIONS_COMMON_EXTENSION_RESOURCE_H_
+#define EXTENSIONS_COMMON_EXTENSION_RESOURCE_H_
 
 #include <string>
 
 #include "base/files/file_path.h"
 
+namespace extensions {
+
 // 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,
@@ skipping 53 matching lines @@
   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_
+}  // namespace extensions
+
+#endif  // EXTENSIONS_COMMON_EXTENSION_RESOURCE_H_