First CL for removing our dependency on the checked-in binary for building

utils/compiler/create_snapshot.dart

 // Copyright (c) 2013, 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.
 
 import 'dart:io';
 
 Future<String> getVersion(var options, var rootPath) {
-  var os = Platform.operatingSystem;
-  var suffix = os == 'windows' ? '.exe' : '';
-  var checkedInBinary =
-      rootPath.join(new Path('tools/testing/bin/$os/dart$suffix'));
-  var versionPath = rootPath.append("tools").append("version.dart");
-  return Process.run(checkedInBinary.toNativePath(),
-                     [versionPath.toNativePath()])
-      .then((result) {
-        if (result.exitCode != 0) {
-          throw "Could not generate version";
-        }
-        return result.stdout.trim();
-      });
+  var suffix = Platform.operatingSystem == 'windows' ? '.exe' : '';
+  var printVersionScript =
+      rootPath.append("tools").append("print_version.py").toNativePath();
+  return Process.run("python$suffix", [printVersionScript]).then((result) {
+    if (result.exitCode != 0) {
+      throw "Could not generate version";
+    }
+    return result.stdout.trim();
+  });
 }
 
 Future<String> getSnapshotGenerationFile(var options, var args, var rootPath) {
   var dart2js = rootPath.append(args["dart2js_main"]);
   var dartdoc = rootPath.append(args["dartdoc_main"]);
 
   return getVersion(options, rootPath).then((version) {
     var snapshotGenerationText =
 """
 import '${dart2js}' as dart2jsMain;
@@ skipping 61 matching lines @@
 
   var scriptFile = new File(new File(options.script).fullPathSync());
   var path = new Path(scriptFile.directory.path);
   var rootPath = path.directoryPath.directoryPath;
   getSnapshotGenerationFile(options, args, rootPath).then((result) {
     var wrapper = "${args['output_dir']}/utils_wrapper.dart";
     writeSnapshotFile(wrapper, result);
     createSnapshot(options, wrapper, args["package_root"]);
   });
 }