Move the dart2js snapshot into bin directory of sdk root.

sdk/lib/_internal/compiler/implementation/compiler.dart

 // 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.
 
 part of dart2js;
 
 /**
  * If true, print a warning for each method that was resolved, but not
  * compiled.
  */
 const bool REPORT_EXCESS_RESOLUTION = false;
 
+const String BUILD_ID = 'NEED_TO_PASS_IN';

[ricow1, 2013/04/10 12:02:20]

Peter: How do you want this passed down?
All the way as parameters from the dart2js script?

+
 /**
  * If true, dump the inferred types after compilation.
  */
 const bool DUMP_INFERRED_TYPES = false;
 
 /**
- * A string to identify the revision or build.
- *
- * This ID is displayed if the compiler crashes and in verbose mode, and is
- * an aid in reproducing bug reports.
- *
- * The actual string is rewritten during the SDK build process.
- */
-const String BUILD_ID = 'build number could not be determined';
-
-/**
  * Contains backend-specific data that is used throughout the compilation of
  * one work item.
  */
 class ItemCompilationContext {
 }
 
 abstract class WorkItem {
   final ItemCompilationContext compilationContext;
   /**
    * Documentation wanted -- johnniwinther
@@ skipping 1239 matching lines @@
 
   void close() {}
 
   toString() => name;
 
   /// Convenience method for getting an [api.CompilerOutputProvider].
   static NullSink outputProvider(String name, String extension) {
     return new NullSink('$name.$extension');
   }
 }