Don't generate LASTCHANGE at build time.

chrome/chrome.gyp

 # 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.
 {
   'variables': {
     'chromium_code': 1,
 
     'variables': {
       'version_py_path': 'tools/build/version.py',
       'version_path': 'VERSION',
@@ skipping 823 matching lines @@
               'dependencies!': [
                 '../chrome_frame/chrome_frame.gyp:chrome_frame_tests',
                 '../chrome_frame/chrome_frame.gyp:chrome_frame_net_tests',
               ],
             }],
           ],
         },
         {
           'target_name': 'chrome_version_resources',
           'type': 'none',
-          'dependencies': [
-            '../build/util/build_util.gyp:lastchange#target',
-          ],
           'direct_dependent_settings': {
             'include_dirs': [
               '<(SHARED_INTERMEDIATE_DIR)/chrome_version',
             ],
           },
           'sources': [
             'app/chrome_exe.ver',
             'app/chrome_dll.ver',
             'app/nacl64_exe.ver',
             'app/other.ver',
@@ skipping 38 matching lines @@
                 '<@(_outputs)',
               ],
               'message': 'Generating version information in <(_outputs)'
             },
           ],
         },
         {
           'target_name': 'chrome_version_header',
           'type': 'none',
           'hard_dependency': 1,
-          'dependencies': [
-            '../build/util/build_util.gyp:lastchange#target',
-          ],
           'actions': [
             {
               'action_name': 'version_header',
               'variables': {
                 'lastchange_path':
                   '<(DEPTH)/build/util/LASTCHANGE',
               },
               'conditions': [
                 ['branding == "Chrome"', {
                   'variables': {
@@ skipping 128 matching lines @@
           'sources': [
             'browser/safe_browsing/signature_util.h',
             'browser/safe_browsing/signature_util_win.cc',
             'tools/safe_browsing/sb_sigutil.cc',
           ],
         },
       ]},  # 'targets'
     ],  # OS=="win"
   ],  # 'conditions'
 }