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

lib/compiler/implementation/compiler.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 
 /**
  * If true, print a warning for each method that was resolved, but not
  * compiled.
  */
 const bool REPORT_EXCESS_RESOLUTION = false;
@@ skipping 173 matching lines @@
   bool compilationFailed = false;
 
   bool hasCrashed = false;
 
   Compiler([this.tracer = const Tracer(),
             this.enableTypeAssertions = false,
             this.enableUserAssertions = false,
             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();
     world = new World(this);
     scanner = new ScannerTask(this);
     dietParser = new DietParserTask(this);
     parser = new ParserTask(this);
     patchParser = new PatchParserTask(this);
     validator = new TreeValidatorTask(this);
     resolver = new ResolverTask(this);
     closureToClassMapper = new closureMapping.ClosureTask(this);
     checker = new TypeCheckerTask(this);
     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,
              checker, typesTask, constantHandler, enqueuer];
     tasks.addAll(backend.tasks);
   }
 
   Universe get resolverWorld => enqueuer.resolution.universe;
   Universe get codegenWorld => enqueuer.codegen.universe;
 
@@ skipping 727 matching lines @@
  * information in the generated error message.
  */
 bool invariant(Spannable spannable, var condition, {String message: null}) {
   // TODO(johnniwinther): Use [spannable] and [message] to provide better
   // information on assertion errors.
   if (condition is Function){
     condition = condition();
   }
   return spannable != null && condition;
 }