[interpreter] move the dispatch table off heap.

src/isolate.cc

Index: src/isolate.cc
diff --git a/src/isolate.cc b/src/isolate.cc
index a274b6a2560e70c2ccff8095cb4ac50e229b693f..9af0abaf5caeabb350c76a0a8eea7a3baba4b390 100644
--- a/src/isolate.cc
+++ b/src/isolate.cc
@@ -1929,9 +1929,6 @@ void Isolate::Deinit() {
   Sampler* sampler = logger_->sampler();
   if (sampler && sampler->IsActive()) sampler->Stop();
 
-  delete interpreter_;
-  interpreter_ = NULL;
-
   delete deoptimizer_data_;
   deoptimizer_data_ = NULL;
   builtins_.TearDown();
@@ -1951,6 +1948,9 @@ void Isolate::Deinit() {
   heap_.TearDown();
   logger_->TearDown();
 
+  delete interpreter_;
+  interpreter_ = NULL;
+
   cancelable_task_manager()->CancelAndWait();
 
   delete cpu_profiler_;