Implements support for ignoring method type arguments in resolution.

pkg/compiler/lib/src/serialization/modelz.dart

Index: pkg/compiler/lib/src/serialization/modelz.dart
diff --git a/pkg/compiler/lib/src/serialization/modelz.dart b/pkg/compiler/lib/src/serialization/modelz.dart
index 9c346d935b83634ea20b720211b4d32fdf090881..d65cdce64db5ef16673aa633bdeb1b98dae87d15 100644
--- a/pkg/compiler/lib/src/serialization/modelz.dart
+++ b/pkg/compiler/lib/src/serialization/modelz.dart
@@ -734,6 +734,9 @@ abstract class FunctionTypedElementMixin
     return _decoder.getBool(Key.IS_EXTERNAL,
         isOptional: true, defaultValue: false);
   }
+
+  @override
+  List<DartType> get typeVariables => functionSignature.typeVariables;
 }
 
 abstract class ClassElementMixin implements ElementZ, ClassElement {
@@ -1250,6 +1253,9 @@ class ForwardingConstructorElementZ extends ElementZ
     // variables correctly.
     return definingConstructor.type;
   }
+
+  @override
+  List<DartType> get typeVariables => _unsupported("typeVariables");
 }
 
 abstract class MemberElementMixin
@@ -1777,6 +1783,9 @@ abstract class ParameterElementZ extends DeserializedElementZ
 
   @override
   MemberElement get memberContext => executableContext.memberContext;
+
+  @override
+  List<DartType> get typeVariables => functionSignature.typeVariables;
 }
 
 class LocalParameterElementZ extends ParameterElementZ