Post-meetup feature extravaganza.

runtime/vm/isolate.h

Index: runtime/vm/isolate.h
===================================================================
--- runtime/vm/isolate.h	(revision 32027)
+++ runtime/vm/isolate.h	(working copy)
@@ -35,6 +35,7 @@
 class ICData;
 class Instance;
 class IsolateProfilerData;
+class IsolateSpawnState;
 class LongJumpScope;
 class MessageHandler;
 class Mutex;
@@ -237,8 +238,8 @@
   bool is_runnable() const { return is_runnable_; }
   void set_is_runnable(bool value) { is_runnable_ = value; }
 
-  uword spawn_data() const { return spawn_data_; }
-  void set_spawn_data(uword value) { spawn_data_ = value; }
+  IsolateSpawnState* spawn_state() const { return spawn_state_; }
+  void set_spawn_state(IsolateSpawnState* value) { spawn_state_ = value; }
 
   static const intptr_t kNoDeoptId = -1;
   static const intptr_t kDeoptIdStep = 2;
@@ -450,7 +451,7 @@
   uword stack_limit_;
   uword saved_stack_limit_;
   MessageHandler* message_handler_;
-  uword spawn_data_;
+  IsolateSpawnState* spawn_state_;
   bool is_runnable_;
   GcPrologueCallbacks gc_prologue_callbacks_;
   GcEpilogueCallbacks gc_epilogue_callbacks_;