Mark optimized code that used CHA for optimization so that lazy class 'finalization' does not inval…

runtime/vm/isolate.h

Index: runtime/vm/isolate.h
===================================================================
--- runtime/vm/isolate.h	(revision 32176)
+++ runtime/vm/isolate.h	(working copy)
@@ -113,6 +113,9 @@
 
   ObjectHistogram* object_histogram() { return object_histogram_; }
 
+  bool cha_used() const { return cha_used_; }
+  void set_cha_used(bool value) { cha_used_ = value; }
+
   MegamorphicCacheTable* megamorphic_cache_table() {
     return &megamorphic_cache_table_;
   }
@@ -457,6 +460,8 @@
   intptr_t stack_frame_index_;
   ObjectHistogram* object_histogram_;
 
+  bool cha_used_;
+
   // Ring buffer of objects assigned an id.
   ObjectIdRing* object_id_ring_;