Fix another closure/type variable error by using analyzeTypeVariables.

sdk/lib/_internal/compiler/implementation/ssa/builder.dart

Index: sdk/lib/_internal/compiler/implementation/ssa/builder.dart
===================================================================
--- sdk/lib/_internal/compiler/implementation/ssa/builder.dart	(revision 28989)
+++ sdk/lib/_internal/compiler/implementation/ssa/builder.dart	(working copy)
@@ -1890,7 +1890,8 @@
       if (type.containsTypeVariables) {
         bool contextIsTypeArguments = false;
         HInstruction context;
-        if (currentElement.isInstanceMember()) {
+        if (!currentElement.enclosingElement.isClosure()
+            && currentElement.isInstanceMember()) {
           context = localsHandler.readThis();
         } else {
           ClassElement contextClass = Types.getClassContext(type);
@@ -2934,7 +2935,8 @@
         contextName = graph.addConstantString(
             new DartString.literal(backend.namer.getNameOfClass(contextClass)),
             node, compiler);
-        if (currentElement.isInstanceMember()) {
+        if (!currentElement.enclosingElement.isClosure()
+            && currentElement.isInstanceMember()) {
           context = localsHandler.readThis();
           typeArguments = graph.addConstantNull(compiler);
         } else {