Implement type cast in the VM.

runtime/vm/opt_code_generator_ia32.cc

Index: runtime/vm/opt_code_generator_ia32.cc
===================================================================
--- runtime/vm/opt_code_generator_ia32.cc	(revision 9048)
+++ runtime/vm/opt_code_generator_ia32.cc	(working copy)
@@ -2098,7 +2098,7 @@
     return;
   }
 
-  if (Token::IsInstanceofOperator(node->kind())) {
+  if (Token::IsTypeTestOperator(node->kind())) {
     VisitLoadOne(node->left(), EAX);
     ASSERT(node->right()->IsTypeNode());
     GenerateInstanceOf(node->id(),
@@ -2112,6 +2112,11 @@
     return;
   }
 
+  if (Token::IsTypeCastOperator(node->kind())) {
+    // This code generator is not maintained anymore.
+    UNIMPLEMENTED();
+  }
+
   if (NodeHasClassAt(node, smi_class_, 0)) {
     if (GenerateSmiComparison(node)) {
       // The comparison was handled, code was emitted.