Take ast node id counting away from Isolate.

src/rewriter.cc

Index: src/rewriter.cc
diff --git a/src/rewriter.cc b/src/rewriter.cc
index 169dce9a41fd42926144b05f03f9ef17cb44ff18..867229a650b611b21eefcd35c73fb627e095446a 100644
--- a/src/rewriter.cc
+++ b/src/rewriter.cc
@@ -15,14 +15,14 @@ namespace internal {
 
 class Processor: public AstVisitor {
  public:
-  Processor(Variable* result, Zone* zone)
+  Processor(Variable* result, Zone* zone, AstNode::IdGen* ast_node_id_gen)
       : result_(result),
         result_assigned_(false),
         is_set_(false),
         in_try_(false),
         // Passing a null AstValueFactory is fine, because Processor doesn't
         // need to create strings or literals.
-        factory_(zone, NULL) {
+        factory_(zone, NULL, ast_node_id_gen) {
     InitializeAstVisitor(zone);
   }
 
@@ -240,7 +240,7 @@ bool Rewriter::Rewrite(CompilationInfo* info) {
         scope->NewTemporary(info->ast_value_factory()->dot_result_string());
     // The name string must be internalized at this point.
     DCHECK(!result->name().is_null());
-    Processor processor(result, info->zone());
+    Processor processor(result, info->zone(), info->ast_node_id_gen());
     processor.Process(body);
     if (processor.HasStackOverflow()) return false;