Support loading binary data in dart2js

pkg/compiler/lib/src/dart2js.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.
 
 library dart2js.cmdline;
 
 import 'dart:async' show Future;
 import 'dart:convert' show UTF8, LineSplitter;
 import 'dart:io' show exit, File, FileMode, Platform, stdin, stderr;
 
@@ skipping 183 matching lines @@
   void setBazelPaths(String argument) {
     String paths = extractParameter(argument);
     bazelPaths = <String>[]..addAll(paths.split(','));
   }
 
   void setResolveOnly(String argument) {
     resolveOnly = true;
     passThrough(argument);
   }
 
-  String getDepsOutput(Map<Uri, SourceFile> sourceFiles) {
+  String getDepsOutput(Map<Uri, api.Input> sourceFiles) {
     var filenames = sourceFiles.keys.map((uri) => '$uri').toList();
     filenames.sort();
     return filenames.join("\n");
   }
 
   implyCompilation(String argument) {
     optionsImplyCompilation.add(argument);
     passThrough(argument);
   }
 
@@ skipping 815 matching lines @@
   compileFunc = generateSerializedDataForDartCore;
 }
 
 class _CompilerInput implements api.CompilerInput {
   final api.CompilerInput _input;
   final Map<Uri, String> _data;
 
   _CompilerInput(this._input, this._data);
 
   @override
-  Future readFromUri(Uri uri) {
+  Future<api.Input> readFromUri(Uri uri,
+      {api.InputKind inputKind: api.InputKind.utf8}) {
     String data = _data[uri];
     if (data != null) {
-      return new Future.value(data);
+      return new Future.value(new StringSourceFile.fromUri(uri, data));
     }
-    return _input.readFromUri(uri);
+    return _input.readFromUri(uri, inputKind: inputKind);
   }
 }
 
 class _SerializedData {
   final Uri uri;
   final String data;
 
   _SerializedData(this.uri, this.data);
 }
 
@@ skipping 23 matching lines @@
   @override
   void add(String event) {
     sb.write(event);
   }
 
   @override
   void close() {
     // Do nothing.
   }
 }