Add comments setting emacs and vim tab width and expansion variables....

chrome/chrome.gyp

 # Copyright (c) 2009 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,
 
     # Define the common dependencies that contain all the actual
     # Chromium functionality.  This list gets pulled in below by
@@ skipping 6796 matching lines @@
               'defines': [
                 'POSIX',
               ],
             }],
           ],
         },
       ],  # targets when chrome_personalization==1
     }],
   ],  # 'conditions'
 }
+
+# Local Variables:
+# tab-width:2
+# indent-tabs-mode:nil
+# End:
+# vim: set expandtab tabstop=2 shiftwidth=2: