Remove getType; use the resolver instead.

lib/compiler/implementation/typechecker.dart

Index: lib/compiler/implementation/typechecker.dart
diff --git a/lib/compiler/implementation/typechecker.dart b/lib/compiler/implementation/typechecker.dart
index c98e4140d8668e56c1a7feba08ff984c4d5b4dcd..6326ddb9f7667bc685b61b074ac6dd45032556bb 100644
--- a/lib/compiler/implementation/typechecker.dart
+++ b/lib/compiler/implementation/typechecker.dart
@@ -578,7 +578,8 @@ class TypeCheckerVisitor implements Visitor<Type> {
   /** Dart Programming Language Specification: 11.10 Return */
   Type visitReturn(Return node) {
     final expression = node.expression;
-    final isVoidFunction = (expectedReturnType === types.voidType);
+    final isVoidFunction =
+        (expectedReturnType.element === compiler.types.voidType.element);
 
     // Executing a return statement return e; [...] It is a static type warning
     // if the type of e may not be assigned to the declared return type of the