Restructure code to enable reloading when a kernel dill file is specified on the command line inste…

runtime/bin/isolate_data.cc

Index: runtime/bin/isolate_data.cc
diff --git a/runtime/bin/isolate_data.cc b/runtime/bin/isolate_data.cc
index 1cf3ebe3d848ddc6613a0f9c6efdf6cce14e5c4d..f3eafa02bf575b63b4450243ac99e907b7c1002a 100644
--- a/runtime/bin/isolate_data.cc
+++ b/runtime/bin/isolate_data.cc
@@ -5,6 +5,8 @@
 #include "bin/isolate_data.h"
 #include "bin/snapshot_utils.h"
 
+#include "vm/kernel.h"
+
 namespace dart {
 namespace bin {
 
@@ -16,6 +18,7 @@ IsolateData::IsolateData(const char* url,
       package_root(NULL),
       packages_file(NULL),
       udp_receive_buffer(NULL),
+      kernel_program(NULL),
       builtin_lib_(NULL),
       loader_(NULL),
       app_snapshot_(app_snapshot),
@@ -46,6 +49,10 @@ IsolateData::~IsolateData() {
   packages_file = NULL;
   free(udp_receive_buffer);
   udp_receive_buffer = NULL;
+  if (kernel_program != NULL) {
+    delete reinterpret_cast<kernel::Program*>(kernel_program);
+    kernel_program = NULL;
+  }
   delete app_snapshot_;
   app_snapshot_ = NULL;
 }