dart2js: Move field-visiting code to the program-builder.

pkg/compiler/lib/src/js_emitter/code_emitter_task.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.js_emitter;
 
 const USE_LAZY_EMITTER = const bool.fromEnvironment("dart2js.use.lazy.emitter");
 
 /**
  * Generates the code for all used classes in the program. Static fields (even
@@ skipping 115 matching lines @@
     // Compute the classes needed by RTI.
     return typeTestRegistry.computeRtiNeededClasses();
   }
 
   int assembleProgram() {
     return measure(() {
       emitter.invalidateCaches();
 
       Set<ClassElement> rtiNeededClasses = _finalizeRti();
       ProgramBuilder programBuilder = new ProgramBuilder(
-          compiler, namer, this, emitter, oldEmitter, rtiNeededClasses);
+          compiler, namer, this, emitter, rtiNeededClasses);
       int size = emitter.emitProgram(programBuilder);
       // TODO(floitsch): we shouldn't need the `neededClasses` anymore.
       neededClasses = programBuilder.collector.neededClasses;
       return size;
     });
   }
 }
 
 abstract class Emitter {
   /// Uses the [programBuilder] to generate a model of the program, emits
@@ skipping 38 matching lines @@
   bool isConstantInlinedOrAlreadyEmitted(ConstantValue constant);
 
   /// Returns the JS code for accessing the given [constant].
   jsAst.Expression constantReference(ConstantValue constant);
 
   /// Returns the JS template for the given [builtin].
   jsAst.Template templateForBuiltin(JsBuiltin builtin);
 
   void invalidateCaches();
 }