Support source maps in server mode

lib/src/codegen/js_codegen.dart

Index: lib/src/codegen/js_codegen.dart
diff --git a/lib/src/codegen/js_codegen.dart b/lib/src/codegen/js_codegen.dart
index 1ca3993e1a8c9303368e813f868f5389a17da4ea..ef523317c81be789fb7bd9ecc4660e90997ea30a 100644
--- a/lib/src/codegen/js_codegen.dart
+++ b/lib/src/codegen/js_codegen.dart
@@ -3500,7 +3500,9 @@ class JSGenerator extends CodeGenerator {
         new JSCodegenVisitor(compiler, rules, library, _extensionTypes, fields);
     var module = codegen.emitLibrary(unit);
     var out = compiler.getOutputPath(library.source.uri);
-    return writeJsLibrary(module, out,
+    var flags = compiler.options;
+    var serverUrl = flags.serverMode ? 'http://${flags.host}:${flags.port}/' : null;

[Jennifer Messerly, 2015/12/16 18:40:07]

format?

[vsm, 2016/01/07 21:22:03]

Done.

+    return writeJsLibrary(module, out, compiler.inputBaseDir, serverUrl,
         emitSourceMaps: options.emitSourceMaps,
         arrowFnBindThisWorkaround: options.arrowFnBindThisWorkaround);
   }