Introduce BackendImpact to separate enqueueing from data.

pkg/compiler/lib/src/js_backend/constant_emitter.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 js_backend;
 
 typedef jsAst.Expression _ConstantReferenceGenerator(ConstantValue constant);
 
 typedef jsAst.Expression _ConstantListGenerator(jsAst.Expression array);
 
@@ skipping 237 matching lines @@
   JavaScriptBackend get backend => compiler.backend;
 
   jsAst.PropertyAccess getHelperProperty(Element helper) {
     return backend.emitter.staticFunctionAccess(helper);
   }
 
   @override
   jsAst.Expression visitType(TypeConstantValue constant, [_]) {
     DartType type = constant.representedType;
     jsAst.Name typeName = namer.runtimeTypeName(type.element);
-    return new jsAst.Call(getHelperProperty(backend.getCreateRuntimeType()),
+    return new jsAst.Call(getHelperProperty(backend.helpers.createRuntimeType),
                           [js.quoteName(typeName)]);
   }
 
   @override
   jsAst.Expression visitInterceptor(InterceptorConstantValue constant, [_]) {
     ClassElement interceptorClass = constant.dispatchedType.element;
     return backend.emitter.interceptorPrototypeAccess(interceptorClass);
   }
 
   @override
@@ skipping 39 matching lines @@
     if (type is InterfaceType &&
         !type.treatAsRaw &&
         backend.classNeedsRti(type.element)) {
       InterfaceType interface = type;
       RuntimeTypes rti = backend.rti;
       Iterable<jsAst.Expression> arguments = interface.typeArguments
           .map((DartType type) =>
               rti.getTypeRepresentationWithPlaceholders(type, (_){}));
       jsAst.Expression argumentList =
           new jsAst.ArrayInitializer(arguments.toList());
-      return new jsAst.Call(getHelperProperty(backend.getSetRuntimeTypeInfo()),
+      return new jsAst.Call(getHelperProperty(backend.helpers.setRuntimeTypeInfo),

[sigurdm, 2015/10/09 10:55:37]

long line

[Johnni Winther, 2015/10/09 11:35:56]

Done.

                             [value, argumentList]);
     }
     return value;
   }
 
   @override
   jsAst.Expression visitDeferred(DeferredConstantValue constant, [_]) {
     return constantReferenceGenerator(constant.referenced);
   }
 }