Refactor the collection of initializer list types

lib/compiler/implementation/universe.dart

Index: lib/compiler/implementation/universe.dart
diff --git a/lib/compiler/implementation/universe.dart b/lib/compiler/implementation/universe.dart
index 0c6bc9b6c476aaa31a135686efd2de9264b2e9ea..635cd737cf1c19b9d2425842d930e1644221f751 100644
--- a/lib/compiler/implementation/universe.dart
+++ b/lib/compiler/implementation/universe.dart
@@ -13,8 +13,6 @@ class Universe {
   final Map<SourceString, Set<Selector>> invokedSetters;
   final Map<SourceString, Set<Selector>> fieldGetters;
   final Map<SourceString, Set<Selector>> fieldSetters;
-  final Map<Element, Map<SourceString, bool>> fieldIntegerInitializers;
-  final Map<Element, Map<SourceString, bool>> fieldIntegerSetters;
   // TODO(ngeoffray): This should be a Set<Type>.
   final Set<Element> isChecks;
   final RuntimeTypeInformation rti;
@@ -29,10 +27,6 @@ class Universe {
                invokedSetters = new Map<SourceString, Set<Selector>>(),
                fieldGetters = new Map<SourceString, Set<Selector>>(),
                fieldSetters = new Map<SourceString, Set<Selector>>(),
-               fieldIntegerInitializers =
-                   new Map<Element, Map<SourceString, bool>>(),
-               fieldIntegerSetters =
-                   new Map<Element, Map<SourceString, bool>>(),
                isChecks = new Set<Element>(),
                rti = new RuntimeTypeInformation();
 
@@ -73,54 +67,6 @@ class Universe {
   bool hasFieldSetter(Element member, Compiler compiler) {
     return hasMatchingSelector(fieldSetters[member.name], member, compiler);
   }
-
-  void updateFieldIntegerInitializers(Type type,
-                                      SourceString name,
-                                      bool isInteger) {
-    Map<SourceString, bool> fields =
-        fieldIntegerInitializers.putIfAbsent(
-            type.element, () => new Map<SourceString, bool>());
-    if (!fields.containsKey(name)) {
-      fields[name] = isInteger;
-    } else {
-      fields[name] = fields[name] && isInteger;
-    }
-  }
-
-  bool hasFieldOnlyIntegerInitializers(Type type, SourceString name) {
-    if (type == null) return false;
-    if (!fieldIntegerInitializers.containsKey(type.element)) return true;
-    Map<SourceString, bool> fields = fieldIntegerInitializers[type.element];
-    if (!fields.containsKey(name)) return false;
-    return fields[name];
-  }
-
-  void updateFieldIntegerSetters(Type type, SourceString name, bool isInteger) {
-    Map<SourceString, bool> fields =
-        fieldIntegerSetters.putIfAbsent(
-            type.element, () => new Map<SourceString, bool>());
-    if (!fields.containsKey(name)) {
-      fields[name] = isInteger;
-    } else {
-      fields[name] = fields[name] && isInteger;
-    }
-  }
-
-  bool couldHaveFieldOnlyIntegerSetters(Type type, SourceString name) {
-    if (type == null) return false;
-    if (!fieldIntegerSetters.containsKey(type.element)) return true;
-    Map<SourceString, bool> fields = fieldIntegerSetters[type.element];
-    if (!fields.containsKey(name)) return false;
-    return fields[name];
-  }
-
-  bool hasFieldOnlyIntegerSetters(Type type, SourceString name) {
-    if (type == null) return false;
-    if (!fieldIntegerSetters.containsKey(type.element)) return true;
-    Map<SourceString, bool> fields = fieldIntegerSetters[type.element];
-    if (!fields.containsKey(name)) return false;
-    return fields[name];
-  }
 }
 
 class SelectorKind {