First pass at asynchronous input loading in dart2js.

sdk/lib/_internal/compiler/implementation/mirrors/dart2js_mirror.dart

Index: sdk/lib/_internal/compiler/implementation/mirrors/dart2js_mirror.dart
diff --git a/sdk/lib/_internal/compiler/implementation/mirrors/dart2js_mirror.dart b/sdk/lib/_internal/compiler/implementation/mirrors/dart2js_mirror.dart
index 14934380c2eefe897c3adf54387cb698f95c116d..09ac0618dd01c849b1909235d17af21b17386ab2 100644
--- a/sdk/lib/_internal/compiler/implementation/mirrors/dart2js_mirror.dart
+++ b/sdk/lib/_internal/compiler/implementation/mirrors/dart2js_mirror.dart
@@ -225,12 +225,13 @@ Future<MirrorSystem> analyze(List<Uri> libraries,
                                            internalDiagnosticHandler,
                                            libraryRoot, packageRoot, options);
   compiler.librariesToAnalyzeWhenRun = libraries;
-  bool success = compiler.run(null);
-  if (success && !compilationFailed) {
-    return new Future<MirrorSystem>.value(new Dart2JsMirrorSystem(compiler));
-  } else {
-    return new Future<MirrorSystem>.error('Failed to create mirror system.');
-  }
+  return compiler.run(null).then((success) {
+    if (success && !compilationFailed) {
+      return new Dart2JsMirrorSystem(compiler);
+    } else {
+      throw 'Failed to create mirror system.';
+    }
+  });

[Bob Nystrom, 2013/06/26 01:03:24]

Well, at least one part of the codebase got cleaner!

[ahe, 2013/06/26 07:02:00]

Indeed!

 }
 
 //------------------------------------------------------------------------------