Use typedefs in lib.

sdk/lib/_internal/compiler/implementation/js_backend/emitter.dart

Index: sdk/lib/_internal/compiler/implementation/js_backend/emitter.dart
diff --git a/sdk/lib/_internal/compiler/implementation/js_backend/emitter.dart b/sdk/lib/_internal/compiler/implementation/js_backend/emitter.dart
index 9032bf5771014cebc31741fd6f7bb9c10a93c6a6..a5d8ed2fb5ec2525e94e7cc5dec832d61afc58e7 100644
--- a/sdk/lib/_internal/compiler/implementation/js_backend/emitter.dart
+++ b/sdk/lib/_internal/compiler/implementation/js_backend/emitter.dart
@@ -1544,9 +1544,9 @@ class CodeEmitterTask extends CompilerTask {
 
   bool canGenerateCheckedSetter(Element member) {
     DartType type = member.computeType(compiler);
-    if (type.element.isTypeVariable()
-        || type.element == compiler.dynamicClass
-        || type.element == compiler.objectClass) {
+    if (type.containsTypeVariables ||

[Johnni Winther, 2013/07/05 06:38:26]

This is a temporary fix for issue 11273.

[karlklose, 2013/07/08 08:37:30]

Change that to bailout for function types and go to the raw type for interface
type, so we don't lose coverage of these tests.

[karlklose, 2013/07/08 08:37:30]

Change that to bailout for function types and go to the raw type for interface
type, so we don't lose coverage of these tests.

+        type.element == compiler.dynamicClass ||
+        type.element == compiler.objectClass) {
       // TODO(ngeoffray): Support type checks on type parameters.
       return false;
     }