Use the entity model for dump_info.

pkg/compiler/lib/src/kernel/element_map_impl.dart

Index: pkg/compiler/lib/src/kernel/element_map_impl.dart
diff --git a/pkg/compiler/lib/src/kernel/element_map_impl.dart b/pkg/compiler/lib/src/kernel/element_map_impl.dart
index f75f78bffc6ed7a0ba381bbfea13db9c7da35600..22c35bef9cffb507fae44ad3648ba72d19b6e2f3 100644
--- a/pkg/compiler/lib/src/kernel/element_map_impl.dart
+++ b/pkg/compiler/lib/src/kernel/element_map_impl.dart
@@ -1353,6 +1353,11 @@ class KernelElementEnvironment implements ElementEnvironment {
     return function.functionType;
   }
 
+  @override
+  ConstantExpression getFieldConstant(FieldEntity field) {
+    return elementMap._getFieldConstantExpression(field);
+  }
+
   @override
   DartType getUnaliasedType(DartType type) => type;
 
@@ -1412,7 +1417,8 @@ class KernelElementEnvironment implements ElementEnvironment {
 
   @override
   void forEachConstructor(
-      ClassEntity cls, void f(ConstructorEntity constructor)) {
+      ClassEntity cls, void f(ConstructorEntity constructor),
+      {bool ensureResolved: true}) {
     elementMap._forEachConstructor(cls, f);
   }
 
@@ -1422,6 +1428,13 @@ class KernelElementEnvironment implements ElementEnvironment {
     elementMap._forEachConstructorBody(cls, f);
   }
 
+  @override
+  void forEachNestedClosure(
+      MemberEntity member, void f(FunctionEntity closure)) {
+    throw new UnimplementedError(
+        'KernelElementEnvironment.forEachNestedClosure');
+  }
+
   @override
   void forEachLibraryMember(
       LibraryEntity library, void f(MemberEntity member)) {
@@ -1502,6 +1515,16 @@ class KernelElementEnvironment implements ElementEnvironment {
     // TODO(redemption): Support this.
     throw new UnsupportedError('ElementEnvironment.getTypedefAlias');
   }
+
+  // TODO(het): This assumes that everything in the kernel model has been
+  // resolved.
+  @override
+  bool hasBeenResolved(Entity entity) => true;
+
+  // TODO(het): This assumes that everything in the kernel model has been
+  // resolved.
+  @override
+  bool hasClassBeenResolved(ClassEntity cls) => true;
 }
 
 /// Visitor that converts kernel dart types into [DartType].