Move component updater artifacts into component_updater namespace.

chrome/browser/component_updater/component_unpacker.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_BROWSER_COMPONENT_UPDATER_COMPONENT_UNPACKER_H_
 #define CHROME_BROWSER_COMPONENT_UPDATER_COMPONENT_UNPACKER_H_
 
 #include <string>
 #include <vector>
+
 #include "base/basictypes.h"
 #include "base/files/file_path.h"
 #include "base/json/json_file_value_serializer.h"
 #include "base/memory/scoped_ptr.h"
 
+namespace component_updater {
+
 class ComponentInstaller;
 class ComponentPatcher;
 
 // Deserializes the CRX manifest. The top level must be a dictionary.
 scoped_ptr<base::DictionaryValue> ReadManifest(
     const base::FilePath& unpack_path);
 
 // In charge of unpacking the component CRX package and verifying that it is
 // well formed and the cryptographic signature is correct. If there is no
 // error the component specific installer will be invoked to proceed with
@@ skipping 45 matching lines @@
   Error error() const { return error_; }
 
   int extended_error() const { return extended_error_; }
 
  private:
   base::FilePath unpack_path_;
   Error error_;
   int extended_error_;  // Provides additional error information.
 };
 
+}  // namespace component_updater
+
 #endif  // CHROME_BROWSER_COMPONENT_UPDATER_COMPONENT_UNPACKER_H_