Change the handling of catch blocks to use context extension objects...

src/prettyprinter.cc

Index: src/prettyprinter.cc
===================================================================
--- src/prettyprinter.cc	(revision 1089)
+++ src/prettyprinter.cc	(working copy)
@@ -285,6 +285,15 @@
 }
 
 
+void PrettyPrinter::VisitCatchExtensionObject(CatchExtensionObject* node) {
+  Print("{ ");
+  Visit(node->key());
+  Print(": ");
+  Visit(node->value());
+  Print(" }");
+}
+
+
 void PrettyPrinter::VisitSlot(Slot* node) {
   switch (node->type()) {
     case Slot::PARAMETER:
@@ -955,6 +964,13 @@
 }
 
 
+void AstPrinter::VisitCatchExtensionObject(CatchExtensionObject* node) {
+  IndentedScope indent("CatchExtensionObject");
+  PrintIndentedVisit("KEY", node->key());
+  PrintIndentedVisit("VALUE", node->value());
+}
+
+
 void AstPrinter::VisitSlot(Slot* node) {
   PrintIndented("SLOT ");
   switch (node->type()) {