Support loading binary data in dart2js

pkg/compiler/lib/src/compiler.dart

Index: pkg/compiler/lib/src/compiler.dart
diff --git a/pkg/compiler/lib/src/compiler.dart b/pkg/compiler/lib/src/compiler.dart
index 82daf7def17787062cec6f0a080db260a5da7f4b..2084a7e37b535b75f65802da6dcfc911c0f1399e 100644
--- a/pkg/compiler/lib/src/compiler.dart
+++ b/pkg/compiler/lib/src/compiler.dart
@@ -39,6 +39,7 @@ import 'environment.dart';
 import 'frontend_strategy.dart';
 import 'id_generator.dart';
 import 'io/source_information.dart' show SourceInformation;
+import 'io/source_file.dart' show Binary;
 import 'js_backend/backend.dart' show JavaScriptBackend;
 import 'js_backend/element_strategy.dart' show ElementBackendStrategy;
 import 'kernel/kernel_strategy.dart';
@@ -856,6 +857,11 @@ abstract class Compiler {
         node, 'Compiler.readScript not implemented.');
   }
 
+  Future<Binary> readBinary(Uri readableUri, [Spannable node]) {
+    throw new SpannableAssertionFailure(
+        node, 'Compiler.readBinary not implemented.');
+  }
+
   Element lookupElementIn(ScopeContainerElement container, String name) {
     Element element = container.localLookup(name);
     if (element == null) {
@@ -1542,6 +1548,9 @@ class _ScriptLoader implements ScriptLoader {
 
   Future<Script> readScript(Uri uri, [Spannable spannable]) =>
       compiler.readScript(uri, spannable);
+
+  Future<Binary> readBinary(Uri uri, [Spannable spannable]) =>
+      compiler.readBinary(uri, spannable);
 }
 
 /// [ScriptLoader] used to ensure that scripts are not loaded accidentally
@@ -1554,6 +1563,11 @@ class _NoScriptLoader implements ScriptLoader {
     throw compiler.reporter
         .internalError(spannable, "Script loading of '$uri' is not enabled.");
   }
+
+  Future<Binary> readBinary(Uri uri, [Spannable spannable]) {
+    throw compiler.reporter
+        .internalError(spannable, "Script loading of '$uri' is not enabled.");
+  }
 }
 
 class _ElementScanner implements ElementScanner {