Generate snapshot for dartj2s; use it in the SDK.

dart/tools/create_sdk.py

 #!/usr/bin/env python
 #
 # Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 #
 # A script which will be invoked from gyp to create an SDK.
 #
 # Usage: create_sdk.py sdk_directory
 #
@@ skipping 113 matching lines @@
     Copy(os.path.join(build_dir, 'dart2js'), dart2js)
     dartdoc = os.path.join(sdk_root, 'bin', 'dartdoc')
     Copy(os.path.join(build_dir, 'dartdoc'), dartdoc)
 
     # TODO(dgrove) - fix this once issue 4788 is addressed.
     ReplaceInFiles([dart2js],
                    [(r'\$BIN_DIR/\.\./\.\./lib', r'$BIN_DIR/../pkg')])
     ReplaceInFiles([dartdoc],
                    [(r'\$BIN_DIR/\.\./\.\.', r'$BIN_DIR/..')])
 
+    # TODO(ahe): Enable for Windows as well.
+    subprocess.call([os.path.join(build_dir, 'gen_snapshot'),
+
+                     # TODO(ahe): Remove option when
+                     # http://dartbug.com/5989 is fixed.
+                     '--optimization_counter_threshold=-1',
+
+                     '--script_snapshot=%s' %
+                     os.path.join(sdk_root, 'pkg', 'compiler',
+                                  'implementation', 'dart2js.dart.snapshot'),
+                     os.path.join(sdk_root, 'pkg', 'compiler',
+                                  'implementation', 'dart2js.dart')])
+
+
 
 def Main(argv):
   # Pull in all of the gpyi files which will be munged into the sdk.
   io_runtime_sources = \
     (eval(open("runtime/bin/io_sources.gypi").read()))['sources']
 
   HOME = dirname(dirname(realpath(__file__)))
 
   SDK_tmp = tempfile.mkdtemp()
   SDK = argv[1]
@@ skipping 186 matching lines @@
     with open(os.path.join(SDK_tmp, 'revision'), 'w') as f:
       f.write(revision + '\n')
       f.close()
 
   Copy(join(HOME, 'README.dart-sdk'), join(SDK_tmp, 'README'))
 
   move(SDK_tmp, SDK)
 
 if __name__ == '__main__':
   sys.exit(Main(sys.argv))