PATCH (not to be comitted): Support for printing instruction statistics

runtime/vm/object.h

Index: runtime/vm/object.h
diff --git a/runtime/vm/object.h b/runtime/vm/object.h
index 61a2866e27bbafd89d2dee7514b7633fd0217004..45b0f16c24c97cfe1740b3c2432573b2c4cd2d64 100644
--- a/runtime/vm/object.h
+++ b/runtime/vm/object.h
@@ -4748,6 +4748,19 @@ class Code : public Object {
   const Comments& comments() const;
   void set_comments(const Comments& comments) const;
 
+  CodeStatistics* stats() const {
+#ifdef DART_PRECOMPILER
+    return raw_ptr()->function_stats_;
+#else
+    return NULL;
+#endif
+  }
+  void set_stats(CodeStatistics* stats) const {
+#ifdef DART_PRECOMPILER
+    StoreNonPointer(&raw_ptr()->function_stats_, stats);
+#endif
+  }
+
   RawObject* return_address_metadata() const {
 #if defined(DART_PRECOMPILED_RUNTIME)
     UNREACHABLE();