Add linux3 build support to chromium (base repository)

tools/heapcheck/chrome_tests.py

 #!/usr/bin/python
 
 # Copyright (c) 2011 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.
 
 ''' Runs various chrome tests through heapcheck_test.py.
 
 Most of this code is copied from ../valgrind/chrome_tests.py.
 TODO(glider): put common functions to a standalone module.
@@ skipping 439 matching lines @@
 
   for t in options.test:
     tests = ChromeTests(options, args, t)
     ret = tests.Run()
     if ret:
       return ret
   return 0
 
 
 if __name__ == "__main__":
-  if sys.platform == 'linux2':
+  if sys.platform.startswith('linux'):
     ret = _main(sys.argv)
   else:
     logging.error("Heap checking works only on Linux at the moment.")
     ret = 1
   sys.exit(ret)