Stop copying chrome.pak to the product directory.

chrome/chrome_repack_chrome.gypi

 # 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.
 {
+  # This file is an unused, a mostly empty placeholder which should go away
+  # eventually -- http://crbug.com/52609
   'action_name': 'repack_chrome',
   'variables': {
     'pak_inputs': [
       '<(SHARED_INTERMEDIATE_DIR)/net/net_resources.pak',
     ],
   },
   'inputs': [
     '<(repack_path)',
     '<@(pak_inputs)',
   ],
   'outputs': [
     '<(SHARED_INTERMEDIATE_DIR)/repack/chrome.pak',
   ],
   'action': ['python', '<(repack_path)', '<@(_outputs)', '<@(pak_inputs)'],
 }