Use the entity model for dump_info.

pkg/compiler/lib/src/common_elements.dart

 // Copyright (c) 2014, 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.
 
 // TODO(sigmund): rename and move to common/elements.dart
 library dart2js.type_system;
 
 import 'common.dart';
 import 'common/names.dart' show Identifiers, Uris;
 import 'constants/values.dart';
 import 'elements/entities.dart';
 import 'elements/names.dart' show PublicName;
 import 'elements/types.dart';
 import 'js_backend/backend.dart' show JavaScriptBackend;
 import 'js_backend/constant_system_javascript.dart';
 import 'js_backend/native_data.dart' show NativeBasicData;
+import 'constants/expressions.dart' show ConstantExpression;
 import 'universe/call_structure.dart' show CallStructure;
 import 'universe/selector.dart' show Selector;
 import 'universe/call_structure.dart';
 
 /// The common elements and types in Dart.
 class CommonElements {
   final ElementEnvironment _env;
 
   CommonElements(this._env);
 
@@ skipping 1218 matching lines @@
 
   /// Calls [f] for each class member declared or inherited in [cls] together
   /// with the class that declared the member.
   ///
   /// TODO(johnniwinther): This should not include static members of
   /// superclasses.
   void forEachClassMember(
       ClassEntity cls, void f(ClassEntity declarer, MemberEntity member));
 
   /// Calls [f] for every constructor declared in [cls].
+  ///
+  /// Will ensure that the class and all constructors are resolved if
+  /// [ensureResolved] is `true`.
   void forEachConstructor(
-      ClassEntity cls, void f(ConstructorEntity constructor));
+      ClassEntity cls, void f(ConstructorEntity constructor),
+      {bool ensureResolved: true});

[Siggi Cherem (dart-lang), 2017/08/30 17:30:42]

since we don't really have "resolution" in the new pipeline, it seems odd to
expose the notion of "resolved" to the environment. I wonder if we should do
something different for this and `hasBeenResolved`.

For `hasBeenResolved` I have some ideas:

 - we could use `enqueuer.processedEntities.contains(member)` and
`enqueuer.processedClasses.contains(cls)`, but we need to make sure to use the
correct enqueuer: in the new world we have K and J elements, so the "resolution"
enqueuer will refer to the K elements, while the codegen refers to the J
elements. I believe you will be using the latter.

 - we could also use world.processedMembers (but may need to also add
processedClasses there)

For this function, I'm not sure what else to do, though.

Questions for Johnni: 
 - should we add processedClasses to world?
 - any preference between the alternatives above?
 - other ideas on what to do here?

I'm also OK landing with none or some of these changes, in which case let's just
add a "TODO(redemption)" to revisit these pieces later .

[Harry Terkelsen, 2017/08/30 21:28:50]

Done, except for classes I'm still asking if it was resolved (through
MirrorsData) since I need to get the static members of classes that may never
have been instantiated.

 
   /// Calls [f] for every constructor body in [cls].
   void forEachConstructorBody(
       ClassEntity cls, void f(ConstructorBodyEntity constructorBody));
 
+  /// Calls [f] for each nested closure in [member].
+  void forEachNestedClosure(
+      MemberEntity member, void f(FunctionEntity closure));
+
   /// Returns the superclass of [cls].
   ///
   /// If [skipUnnamedMixinApplications] is `true`, unnamed mixin applications
   /// are excluded, for instance for these classes
   ///
   ///     class S {}
   ///     class M {}
   ///     class C extends S with M {}
   ///
   /// the result of `getSuperClass(C)` is the unnamed mixin application
@@ skipping 59 matching lines @@
 
   /// Returns the type of [function].
   FunctionType getFunctionType(FunctionEntity function);
 
   /// Returns the type of [field].
   DartType getFieldType(FieldEntity field);
 
   /// Returns the type of the [local] function.
   FunctionType getLocalFunctionType(Local local);
 
+  /// Gets the constant value of [field], or `null` if [field] is non-const.
+  ConstantExpression getFieldConstant(FieldEntity field);
+
   /// Returns the 'unaliased' type of [type]. For typedefs this is the function
   /// type it is an alias of, for other types it is the type itself.
   ///
   /// Use this during resolution to ensure that the alias has been computed.
   // TODO(johnniwinther): Remove this when the resolver is removed.
   DartType getUnaliasedType(DartType type);
 
   /// Returns `true` if [member] a the synthetic getter `loadLibrary` injected
   /// on deferred libraries.
   bool isDeferredLoadLibraryGetter(MemberEntity member);
 
   /// Returns the metadata constants declared on [library].
   Iterable<ConstantValue> getLibraryMetadata(LibraryEntity library);
 
   /// Returns the metadata constants declared on [cls].
   Iterable<ConstantValue> getClassMetadata(ClassEntity cls);
 
   /// Returns the metadata constants declared on [typedef].
   Iterable<ConstantValue> getTypedefMetadata(TypedefEntity typedef);
 
   /// Returns the metadata constants declared on [member].
   Iterable<ConstantValue> getMemberMetadata(MemberEntity member,
       {bool includeParameterMetadata: false});
 
   /// Returns the function type that is an alias of a [typedef].
   FunctionType getFunctionTypeOfTypedef(TypedefEntity typedef);
+
+  /// Returns `true` if [entity] has been resolved.
+  bool hasBeenResolved(Entity entity);
+
+  /// Returns `true` if [cls] has been resolved.
+  bool hasClassBeenResolved(ClassEntity cls);
 }