dart2js: use WorldImpact for dump_info

pkg/compiler/lib/src/universe/function_set.dart

Index: pkg/compiler/lib/src/universe/function_set.dart
diff --git a/pkg/compiler/lib/src/universe/function_set.dart b/pkg/compiler/lib/src/universe/function_set.dart
index 9f13c1ea2293b8a2eecbd0fddca6ebbb9be8596b..ae42ac2dc80a10bc2d393e8953daf87c4bdfe37d 100644
--- a/pkg/compiler/lib/src/universe/function_set.dart
+++ b/pkg/compiler/lib/src/universe/function_set.dart
@@ -19,6 +19,8 @@ import '../world.dart' show
 
 import 'selector.dart' show
     Selector;
+import 'universe.dart' show
+    ReceiverConstraint;
 
 // TODO(kasperl): This actually holds getters and setters just fine
 // too and stricly they aren't functions. Maybe this needs a better
@@ -64,22 +66,22 @@ class FunctionSet {
 
   /// Returns an object that allows iterating over all the functions
   /// that may be invoked with the given [selector].
-  Iterable<Element> filter(Selector selector, TypeMask mask) {
+  Iterable<Element> filter(Selector selector, ReceiverConstraint mask) {

[Siggi Cherem (dart-lang), 2015/11/12 01:10:59]

rename all [mask] to [constraint]? or add TODO?

[Harry Terkelsen, 2015/11/12 01:25:40]

Done.

     return query(selector, mask).functions;
   }
 
   /// Returns the mask for the potential receivers of a dynamic call to
   /// [selector] on [mask].
   ///
-  /// This will reduce the set of classes in [mask] to a [TypeMask] of the set
+  /// This will narrow the constraints of [mask] to a [TypeMask] of the set
   /// of classes that actually implement the selected member or implement the
   /// handling 'noSuchMethod' where the selected member is unimplemented.
-  TypeMask receiverType(Selector selector, TypeMask mask) {
+  TypeMask receiverType(Selector selector, ReceiverConstraint mask) {
     return query(selector, mask).computeMask(classWorld);
   }
 
   SelectorMask _createSelectorMask(
-      Selector selector, TypeMask mask, ClassWorld classWorld) {
+      Selector selector, ReceiverConstraint mask, ClassWorld classWorld) {
     return mask != null
         ? new SelectorMask(selector, mask)
         : new SelectorMask(selector,
@@ -87,9 +89,9 @@ class FunctionSet {
   }
 
   /// Returns the set of functions that can be the target of a call to
-  /// [selector] on a receiver of type [mask] including 'noSuchMethod' methods
-  /// where applicable.
-  FunctionSetQuery query(Selector selector, TypeMask mask) {
+  /// [selector] on a receiver constrained by [mask] including 'noSuchMethod'
+  /// methods where applicable.
+  FunctionSetQuery query(Selector selector, ReceiverConstraint mask) {
     String name = selector.name;
     SelectorMask selectorMask = _createSelectorMask(selector, mask, classWorld);
     SelectorMask noSuchMethodMask =
@@ -119,10 +121,10 @@ class FunctionSet {
 /// a receiver of type [mask].
 class SelectorMask {
   final Selector selector;
-  final TypeMask mask;
+  final ReceiverConstraint mask;
   final int hashCode;
 
-  SelectorMask(Selector selector, TypeMask mask)
+  SelectorMask(Selector selector, ReceiverConstraint mask)
       : this.selector = selector,
         this.mask = mask,
         this.hashCode =