[dart2dart] Make removal of asserts and forcing type strips go under

lib/compiler/implementation/compiler.dart

Index: lib/compiler/implementation/compiler.dart
diff --git a/lib/compiler/implementation/compiler.dart b/lib/compiler/implementation/compiler.dart
index c316b5c551d46de15b61ba2de4ac126b1ea1f123..0b8d762ec6edb292193cc24237c1fb61bc3861a3 100644
--- a/lib/compiler/implementation/compiler.dart
+++ b/lib/compiler/implementation/compiler.dart
@@ -197,7 +197,7 @@ class Compiler implements DiagnosticListener {
             this.enableMinification = false,
             bool emitJavaScript = true,
             bool generateSourceMap = true,
-            bool forceCutDeclarationTypes = false])
+            List<String> strips = const []])
       : libraries = new Map<String, LibraryElement>(),
         progress = new Stopwatch() {
     progress.start();
@@ -213,7 +213,7 @@ class Compiler implements DiagnosticListener {
     typesTask = new ti.TypesTask(this);
     backend = emitJavaScript ?
         new js_backend.JavaScriptBackend(this, generateSourceMap) :
-        new dart_backend.DartBackend(this, forceCutDeclarationTypes);
+        new dart_backend.DartBackend(this, strips);
     constantHandler = new ConstantHandler(this, backend.constantSystem);
     enqueuer = new EnqueueTask(this);
     tasks = [scanner, dietParser, parser, resolver, closureToClassMapper,