Don't link gtest into sandbox lib

sandbox/win/sandbox_win.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.
 
 {
   'target_defaults': {
     'variables': {
       'sandbox_windows_target': 0,
       'target_arch%': 'ia32',
     },
@@ skipping 156 matching lines @@
     ],
   },
   'targets': [
     {
       'target_name': 'sandbox',
       'type': 'static_library',
       'variables': {
         'sandbox_windows_target': 1,
       },
       'dependencies': [
-        '../testing/gtest.gyp:gtest',
         '../base/base.gyp:base',
         '../base/base.gyp:base_static',
       ],
       'export_dependent_settings': [
         '../base/base.gyp:base',
       ],
       'include_dirs': [
         '../..',
       ],
       'direct_dependent_settings': {
@@ skipping 167 matching lines @@
             ],
           },
           'defines': [
             '<@(nacl_win64_defines)',
           ]
         },
       ],
     }],
   ],
 }