Refactor the collection of initializer list types

lib/compiler/implementation/ssa/codegen.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.
 
 class SsaCodeGeneratorTask extends CompilerTask {
   final JavaScriptBackend backend;
   SsaCodeGeneratorTask(JavaScriptBackend backend)
       : this.backend = backend,
         super(backend.compiler);
   String get name() => 'SSA code generator';
@@ skipping 1718 matching lines @@
   visitFieldSet(HFieldSet node) {
     String name;
     if (!node.isFromActivation()) {
       name = compiler.namer.getName(node.element);
       beginExpression(JSPrecedence.ASSIGNMENT_PRECEDENCE);
       use(node.receiver, JSPrecedence.MEMBER_PRECEDENCE);
       buffer.add('.');
       buffer.add(name);
       Type type = node.receiver.propagatedType.computeType(compiler);
       if (type != null) {
-        world.registerFieldSetter(node.element.name,
-                                  type,
-                                  node.value.isInteger());
+        world.registerFieldSetter(node.element.name, type);
+        backend.updateFieldIntegerSetters(type,
+                                          node.element.name,
+                                          node.value.isInteger());
       }
     } else {
       declareInstruction(node.receiver);
     }
     buffer.add(' = ');
     use(node.value, JSPrecedence.ASSIGNMENT_PRECEDENCE);
     if (node.receiver !== null) {
       endExpression(JSPrecedence.ASSIGNMENT_PRECEDENCE);
     }
   }
@@ skipping 14 matching lines @@
     }
     endExpression(JSPrecedence.EXPRESSION_PRECEDENCE);
   }
 
   visitForeignNew(HForeignNew node) {
     var i = 0;
     node.element.forEachInstanceField(
       includeBackendMembers: true,
       includeSuperMembers: true,
       f: (ClassElement enclosingClass, Element member) {
-        world.registerFieldInitializer(member.name,
-                                       enclosingClass.computeType(compiler),
-                                       node.inputs[i].isInteger());
-
+        backend.updateFieldInitializers(enclosingClass.computeType(compiler),
+                                        member.name,
+                                        node.inputs[i].propagatedType);
         i++;
       });
     String jsClassReference = compiler.namer.isolateAccess(node.element);
     beginExpression(JSPrecedence.MEMBER_PRECEDENCE);
     buffer.add('new $jsClassReference(');
     // We can't use 'visitArguments', since our arguments start at input[0].
     List<HInstruction> inputs = node.inputs;
     for (int i = 0; i < inputs.length; i++) {
       if (i != 0) buffer.add(', ');
       use(inputs[i], JSPrecedence.ASSIGNMENT_PRECEDENCE);
@@ skipping 1126 matching lines @@
       startBailoutSwitch();
     }
   }
 
   void endLabeledBlock(HLabeledBlockInformation labeledBlockInfo) {
     if (labeledBlockInfo.body.start.hasGuards()) {
       endBailoutSwitch();
     }
   }
 }