Reverts the following two commits:

pkg/compiler/lib/src/elements/resolution_types.dart

Index: pkg/compiler/lib/src/elements/resolution_types.dart
diff --git a/pkg/compiler/lib/src/elements/resolution_types.dart b/pkg/compiler/lib/src/elements/resolution_types.dart
index 3ba3468ac56055d39cf3a2ea18380b1efa17031c..19fd8c8f4a6f32fdf7f688e7d14348e7027bf4b8 100644
--- a/pkg/compiler/lib/src/elements/resolution_types.dart
+++ b/pkg/compiler/lib/src/elements/resolution_types.dart
@@ -642,16 +642,6 @@ class ResolutionFunctionType extends ResolutionDartType
         optionalParameterTypes, namedParameters, namedParameterTypes);
   }
 
-  factory ResolutionFunctionType.generalized(
-      ResolutionDartType returnType,
-      List<ResolutionDartType> parameterTypes,
-      List<ResolutionDartType> optionalParameterTypes,
-      List<String> namedParameters,
-      List<ResolutionDartType> namedParameterTypes) {
-    return new ResolutionFunctionType.internal(null, returnType, parameterTypes,
-        optionalParameterTypes, namedParameters, namedParameterTypes);
-  }
-
   ResolutionFunctionType.internal(FunctionTypedElement this.element,
       [ResolutionDartType returnType = const ResolutionDynamicType(),
       List<ResolutionDartType> parameterTypes = const <ResolutionDartType>[],