Repro for OOM bug in test.dart (applies to r29345).

dart/sdk/lib/_internal/compiler/implementation/js_emitter/code_emitter_task.dart

Index: dart/sdk/lib/_internal/compiler/implementation/js_emitter/code_emitter_task.dart
diff --git a/dart/sdk/lib/_internal/compiler/implementation/js_emitter/code_emitter_task.dart b/dart/sdk/lib/_internal/compiler/implementation/js_emitter/code_emitter_task.dart
index ac0cec4a9c57c8e5310de019a359053ff8e0893b..7988e2ea69ca0b9dcc78e77f1d91a5fc505bec41 100644
--- a/dart/sdk/lib/_internal/compiler/implementation/js_emitter/code_emitter_task.dart
+++ b/dart/sdk/lib/_internal/compiler/implementation/js_emitter/code_emitter_task.dart
@@ -39,6 +39,10 @@ class CodeEmitterTask extends CompilerTask {
   final Map<String, String> mangledGlobalFieldNames = <String, String>{};
   final Set<String> recordedMangledNames = new Set<String>();
 
+  /// Records if a type variable is read dynamically for type tests.
+  final Set<TypeVariableElement> readTypeVariables =
+      new Set<TypeVariableElement>();
+
   // TODO(ngeoffray): remove this field.
   Set<ClassElement> instantiatedClasses;
 
@@ -1590,4 +1594,8 @@ if (typeof $printHelperName === "function") {
   bool get areAnyElementsDeferred {
     return compiler.deferredLoadTask.areAnyElementsDeferred;
   }
+
+  void registerReadTypeVariable(TypeVariableElement element) {
+    readTypeVariables.add(element);
+  }
 }