[Isolates] Merge from bleeding_edge, revisions 5934-6100.

build/common.gypi

 # Copyright 2010 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
 #       disclaimer in the documentation and/or other materials provided
@@ skipping 62 matching lines @@
             'cflags': [ '-ansi' ],
           }],
           [ 'visibility=="hidden"', {
             'cflags': [ '-fvisibility=hidden' ],
           }],
         ],
       },
     }],
   ],
 }