[components] Make zip a component so that src/chromeos can use it.

components/zip/zip_reader.h

 // Copyright (c) 2011 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_ZIP_READER_H_
-#define CHROME_COMMON_ZIP_READER_H_
+#ifndef COMPONENTS_ZIP_ZIP_READER_H_
+#define COMPONENTS_ZIP_ZIP_READER_H_
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/file_util.h"
 #include "base/files/file_path.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/platform_file.h"
 #include "base/time.h"
 
@@ skipping 150 matching lines @@
   unzFile zip_file_;
   int num_entries_;
   bool reached_end_;
   scoped_ptr<EntryInfo> current_entry_info_;
 
   DISALLOW_COPY_AND_ASSIGN(ZipReader);
 };
 
 }  // namespace zip
 
-#endif  // CHROME_COMMON_ZIP_READER_H_
+#endif  // COMPONENTS_ZIP_ZIP_READER_H_