Don't pull in content_switches.cc to whole chrome code base

chrome/common_constants.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,
   },
 
   'includes': [
@@ skipping 53 matching lines @@
   'targets': [
     {
       'target_name': 'common_constants',
       'type': 'static_library',
       'include_dirs': [
         '<(SHARED_INTERMEDIATE_DIR)',  # Needed by chrome_paths.cc.
       ],
       'dependencies': [
         '../base/base.gyp:base',
         '../components/nacl_common.gyp:nacl_switches',
+        '../content/content.gyp:content_common',
         '../third_party/widevine/cdm/widevine_cdm.gyp:widevine_cdm_version_h',
       ],
       'target_conditions': [
         ['OS=="ios"', {
           # iOS needs chrome_paths_mac, which is excluded by filename rules;
           # re-add it in target_conditionals so it's after that exclusion.
           'sources/': [
             ['include', '^common/chrome_paths_mac\\.mm$'],
           ],
         }],
@@ skipping 26 matching lines @@
           'configurations': {
             'Common_Base': {
               'msvs_target_platform': 'x64',
             },
           },
         },
       ],
     }],
   ],
 }