Use '--source-map' and '--out' options to support source maps from non-commandline.

sdk/lib/_internal/compiler/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.
 
 library compiler;
 
 import 'dart:async';
 import 'implementation/apiimpl.dart';
 
 // Unless explicitly allowed, passing [:null:] for any argument to the
@@ skipping 67 matching lines @@
  * Deprecated: if no [outputProvider] is given, the future completes
  * to the compiled script. This behavior will be removed in the future
  * as the compiler may create multiple files to support lazy loading
  * of libraries.
  */
 Future<String> compile(Uri script,
                        Uri libraryRoot,
                        Uri packageRoot,
                        CompilerInputProvider inputProvider,
                        DiagnosticHandler handler,
-                       [List<String> options = const [], 
+                       [List<String> options = const [],
                         CompilerOutputProvider outputProvider,
                         Map<String, dynamic> environment = const {}]) {
   if (!libraryRoot.path.endsWith("/")) {
     throw new ArgumentError("libraryRoot must end with a /");
   }
   if (packageRoot != null && !packageRoot.path.endsWith("/")) {
     throw new ArgumentError("packageRoot must end with a /");
   }
   // TODO(ahe): Consider completing the future with an exception if
   // code is null.
   Compiler compiler = new Compiler(inputProvider,
                                    outputProvider,
                                    handler,
                                    libraryRoot,
                                    packageRoot,
                                    options,
                                    environment);
   // TODO(ahe): Use the value of the future (which signals success or failure).
   return compiler.run(script).then((_) {
     String code = compiler.assembledCode;
     if (code != null && outputProvider != null) {
-      String outputType = 'js';
-      if (options.contains('--output-type=dart')) {
-        outputType = 'dart';
-      }
-      outputProvider('', outputType)
-          ..add(code)
-          ..close();
       code = ''; // Non-null signals success.
     }
     return code;
   });
 }
 
 /**
  * Kind of diagnostics that the compiler can report.
  */
 class Diagnostic {
@@ skipping 58 matching lines @@
   final String name;
 
   /**
    * This constructor is not private to support user-defined
    * diagnostic kinds.
    */
   const Diagnostic(this.ordinal, this.name);
 
   String toString() => name;
 }