Add --use-new-source-info option

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 3df2ba45fd807844146bab40c26730f30492ffe5..79ff968a7c1d4ee9ae130a7f73cbc0891db84664 100644
--- a/pkg/compiler/lib/src/compiler.dart
+++ b/pkg/compiler/lib/src/compiler.dart
@@ -455,6 +455,7 @@ abstract class Compiler {
             this.dumpInfo: false,
             bool useStartupEmitter: false,
             bool enableConditionalDirectives: false,
+            bool useNewSourceInfo: false,
             this.useContentSecurityPolicy: false,
             bool hasIncrementalSupport: false,
             this.enableExperimentalMirrors: false,
@@ -502,7 +503,8 @@ abstract class Compiler {
       js_backend.JavaScriptBackend jsBackend =
           new js_backend.JavaScriptBackend(
               this, generateSourceMap: generateSourceMap,
-              useStartupEmitter: useStartupEmitter);
+              useStartupEmitter: useStartupEmitter,
+              useNewSourceInfo: useNewSourceInfo);
       backend = jsBackend;
     } else {
       backend = new dart_backend.DartBackend(this, strips,