Added ThisVariable in scoping and the captured scope of initialized fields.

pkg/compiler/lib/src/ssa/type_builder.dart

Index: pkg/compiler/lib/src/ssa/type_builder.dart
diff --git a/pkg/compiler/lib/src/ssa/type_builder.dart b/pkg/compiler/lib/src/ssa/type_builder.dart
index 18cc72a8a23f2b8e18645511f289c2ac35de80dc..08203c8bec485dd78069aacf50ffef1096b3a70c 100644
--- a/pkg/compiler/lib/src/ssa/type_builder.dart
+++ b/pkg/compiler/lib/src/ssa/type_builder.dart
@@ -37,8 +37,7 @@ class TypeBuilder {
 
   /// Produces code that checks the runtime type is actually the type specified
   /// by attempting a type conversion.
-  HInstruction _checkType(
-      HInstruction original, ResolutionDartType type, int kind) {
+  HInstruction _checkType(HInstruction original, DartType type, int kind) {
     assert(builder.options.enableTypeAssertions);
     assert(type != null);
     type = builder.localsHandler.substInContext(type);