Switch to clang for nocompile tests and rebaseline existing results.

tools/nocompile_driver.py

 #!/usr/bin/env 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.
 
 """Implements a simple "negative compile" test for C++ on linux.
 
 Sometimes a C++ API needs to ensure that various usages cannot compile. To
 enable unittesting of these assertions, we use this python script to
 invoke gcc on a source file and assert that compilation fails.
@@ skipping 202 matching lines @@
                       was aborted.  If the test completed successfully,
                       this value is 0.
         'finished_at': A timestamp in seconds since the epoch for when this
                        test was successfully complete.  If the test is aborted,
                        or running, this value is 0.
         'expectations': A dictionary with the test expectations. See
                         ParseExpectation() for the structure.
         }
   """
   # TODO(ajwong): Get the compiler from gyp.
-  cmdline = ['g++']
+  cmdline = [os.path.join(os.path.dirname(os.path.realpath(__file__)),
+                          '../third_party/llvm-build/Release+Asserts/bin',
+                          'clang++')]
   cmdline.extend(shlex.split(cflags))
   name = config['name']
   expectations = config['expectations']
   if expectations is not None:
     cmdline.append('-D%s' % name)
-  cmdline.extend(['-o', '/dev/null', '-c', '-x', 'c++', sourcefile_path])
+  cmdline.extend(['-std=c++11', '-o', '/dev/null', '-c', '-x', 'c++',
+                  sourcefile_path])
 
   process = subprocess.Popen(cmdline, stdout=subprocess.PIPE,
                              stderr=subprocess.PIPE)
   now = time.time()
   return {'proc': process,
           'cmdline': ' '.join(cmdline),
           'name': name,
           'suite_name': config['suite_name'],
           'terminate_timeout': now + NCTEST_TERMINATE_TIMEOUT_SEC,
           'kill_timeout': now + NCTEST_KILL_TIMEOUT_SEC,
@@ skipping 223 matching lines @@
   timings['results_processed'] = time.time()
 
   # We always know at least a sanity test was run.
   WriteStats(resultfile, finished_tests[0]['suite_name'], timings)
 
   resultfile.close()
 
 
 if __name__ == '__main__':
   main()