Fix a crash in dart2js where references to this in inlined initializers id not know what instructio…

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 17974)
+++ sdk/lib/_internal/compiler/implementation/ssa/builder.dart	(working copy)
@@ -1176,9 +1176,15 @@
 
       ClosureClassMap oldClosureData = localsHandler.closureData;
       Node node = constructor.parseNode(compiler);
-      localsHandler.closureData =
+      ClosureClassMap newClosureData =
           compiler.closureToClassMapper.computeClosureToClassMapping(
               constructor, node, elements);
+      // The [:this:] element now refers to the one in the new closure
+      // data, that is the [:this:] of the super constructor. We
+      // update the element to refer to the current [:this:].
+      localsHandler.updateLocal(newClosureData.thisElement,
+                                localsHandler.readThis());
+      localsHandler.closureData = newClosureData;
 
       params.orderedForEachParameter((Element parameterElement) {
         if (elements.isParameterChecked(parameterElement)) {