Fix bug with CHA dependencies by recording a set of classes for registering code.

runtime/vm/object.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/object.h"
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "vm/assembler.h"
 #include "vm/cpu.h"
@@ skipping 2578 matching lines @@
 };
 
 
 class CHACodeArray : public WeakCodeReferences {
  public:
   explicit CHACodeArray(const Class& cls)
       : WeakCodeReferences(Array::Handle(cls.cha_codes())), cls_(cls) {
   }
 
   virtual void UpdateArrayTo(const Array& value) {
+    // TODO(fschneider): Fails for classes in the VM isolate.
     cls_.set_cha_codes(value);
   }
 
   virtual void ReportDeoptimization(const Code& code) {
     if (FLAG_trace_deoptimization || FLAG_trace_deoptimization_verbose) {
       Function& function = Function::Handle(code.function());
       OS::PrintErr("Deoptimizing %s because CHA optimized (%s).\n",
           function.ToFullyQualifiedCString(),
           cls_.ToCString());
     }
@@ skipping 16793 matching lines @@
   return tag_label.ToCString();
 }
 
 
 void UserTag::PrintJSONImpl(JSONStream* stream, bool ref) const {
   Instance::PrintJSONImpl(stream, ref);
 }
 
 
 }  // namespace dart