Track argument types, and remove obsolete code that also used to track it.

sdk/lib/_internal/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.
 
 part of dart2js;
 
 /**
  * If true, print a warning for each method that was resolved, but not
  * compiled.
  */
@@ skipping 877 matching lines @@
     assert(invariant(element, element.isDeclaration));
     TreeElements elements = enqueuer.resolution.getCachedElements(element);
     if (elements != null) return elements;
     assert(parser != null);
     Node tree = parser.parse(element);
     validator.validate(tree);
     elements = resolver.resolve(element);
     if (elements != null) {
       // Only analyze nodes with a corresponding [TreeElements].
       checker.check(tree, elements);
-      typesTask.analyze(tree, elements);
     }
     return elements;
   }
 
   TreeElements analyze(ResolutionWorkItem work, ResolutionEnqueuer world) {
     assert(invariant(work.element, identical(world, enqueuer.resolution)));
     assert(invariant(work.element, !work.isAnalyzed(),
         message: 'Element ${work.element} has already been analyzed'));
     if (progress.elapsedMilliseconds > 500) {
       // TODO(ahe): Add structured diagnostics to the compiler API and
@@ skipping 349 matching lines @@
 
   void close() {}
 
   toString() => name;
 
   /// Convenience method for getting an [api.CompilerOutputProvider].
   static NullSink outputProvider(String name, String extension) {
     return new NullSink('$name.$extension');
   }
 }