dart2js: store typeVariableReader stubs in the model.

pkg/compiler/lib/src/js_emitter/model.dart

Index: pkg/compiler/lib/src/js_emitter/model.dart
diff --git a/pkg/compiler/lib/src/js_emitter/model.dart b/pkg/compiler/lib/src/js_emitter/model.dart
index 313fb8056947c5bc99d452c9945142936965b6ac..7d502320dc29c1662140aa16115b2ff4bcbc38cb 100644
--- a/pkg/compiler/lib/src/js_emitter/model.dart
+++ b/pkg/compiler/lib/src/js_emitter/model.dart
@@ -209,6 +209,9 @@ class Class implements FieldContainer {
   /// Stub methods for this class that are call stubs for getters.
   final List<StubMethod> callStubs;
 
+  /// Stub methods for this class handling reads to type variables.
+  final List<StubMethod> typeVariableReaderStubs;
+
   /// noSuchMethod stubs in the special case that the class is Object.
   final List<StubMethod> noSuchMethodStubs;
   final List<Field> staticFieldsForReflection;
@@ -231,6 +234,7 @@ class Class implements FieldContainer {
         this.fields,
         this.staticFieldsForReflection,
         this.callStubs,
+        this.typeVariableReaderStubs,
         this.noSuchMethodStubs,
         this.isChecks,
         this.functionTypeIndex,
@@ -262,6 +266,7 @@ class MixinApplication extends Class {
                    List<Field> instanceFields,
                    List<Field> staticFieldsForReflection,
                    List<StubMethod> callStubs,
+                   List<StubMethod> typeVariableReaderStubs,
                    List<StubMethod> isChecks,
                    int functionTypeIndex,
                    {bool onlyForRti,
@@ -272,6 +277,7 @@ class MixinApplication extends Class {
               instanceFields,
               staticFieldsForReflection,
               callStubs,
+              typeVariableReaderStubs,
               const <StubMethod>[],
               isChecks, functionTypeIndex,
               onlyForRti: onlyForRti,