Remove stale 'lib64' entries in browser_tests.isolate and chrome.isolate on linux

chrome/browser_tests.isolate

 # 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.
 {
   'conditions': [
     ['OS=="linux"', {
       'variables': {
         'command': [
           '../testing/xvfb.py',
           '<(PRODUCT_DIR)',
@@ skipping 82 matching lines @@
           '<(PRODUCT_DIR)/locales/en-US.pak',
           '<(PRODUCT_DIR)/locales/fr.pak',
           '<(PRODUCT_DIR)/mock_nacl_gdb<(EXECUTABLE_SUFFIX)',
           '<(PRODUCT_DIR)/nacl_irt_x86_64.nexe',
           '<(PRODUCT_DIR)/ppapi_nacl_tests_glibc_x64.nexe',
           '<(PRODUCT_DIR)/ppapi_nacl_tests_newlib_x64.nexe',
           '<(PRODUCT_DIR)/ppapi_nacl_tests_pnacl_newlib_x64.nexe',
         ],
         'isolate_dependency_untracked': [
           '../third_party/bidichecker/',
-          '<(PRODUCT_DIR)/lib64/',
           '<(PRODUCT_DIR)/plugins/',
           '<(PRODUCT_DIR)/resources/extension/',
         ],
       },
     }],
     ['OS=="mac"', {
       'variables': {
         'isolate_dependency_tracked': [
           '<(PRODUCT_DIR)/clearkeycdmadapter.plugin',
           '<(PRODUCT_DIR)/ffmpegsumo.so',
@@ skipping 44 matching lines @@
           'tools/build/repack_locales.py',
         ],
         'isolate_dependency_untracked': [
           '../third_party/npapi/npspy/extern/plugin/',
           '../third_party/psyco_win32/psyco/',
         ],
       },
     }],
   ],
 }