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

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.
  */
@@ skipping 376 matching lines @@
    * Is the compiler in verbose mode.
    */
   final bool verbose;
 
   /**
    * URI of the main source map if the compiler is generating source
    * maps.
    */
   final Uri sourceMapUri;
 
+  /**
+   * URI of the main output if the compiler is generating source maps.
+   */
+  final Uri outputUri;
+
   /// Emit terse diagnostics without howToFix.
   final bool terseDiagnostics;
 
   /// If `true`, warnings and hints not from user code are reported.
   final bool showPackageWarnings;
 
   /// `true` if the last diagnostic was filtered, in which case the
   /// accompanying info message should be filtered as well.
   bool lastDiagnosticWasFiltered = false;
 
@@ skipping 213 matching lines @@
             this.enableMinification: false,
             this.enableNativeLiveTypeAnalysis: false,
             bool emitJavaScript: true,
             bool generateSourceMap: true,
             this.analyzeAllFlag: false,
             bool analyzeOnly: false,
             bool analyzeSignaturesOnly: false,
             this.preserveComments: false,
             this.verbose: false,
             this.sourceMapUri: null,
+            this.outputUri: null,
             this.buildId: UNDETERMINED_BUILD_ID,
             this.terseDiagnostics: false,
             this.dumpInfo: false,
             this.showPackageWarnings: false,
             outputProvider,
             List<String> strips: const []})
       : this.analyzeOnly = analyzeOnly || analyzeSignaturesOnly,
         this.analyzeSignaturesOnly = analyzeSignaturesOnly,
         this.outputProvider = (outputProvider == null)
             ? NullSink.outputProvider
@@ skipping 1176 matching lines @@
   static NullSink outputProvider(String name, String extension) {
     return new NullSink('$name.$extension');
   }
 }
 
 /// Information about suppressed warnings and hints for a given library.
 class SuppressionInfo {
   int warnings = 0;
   int hints = 0;
 }