Add read only handles for the following predefined symbols

vm/dart_entry.cc

 // Copyright (c) 2011, 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/dart_entry.h"
 
 #include "vm/code_generator.h"
 #include "vm/compiler.h"
 #include "vm/object_store.h"
 #include "vm/resolver.h"
@@ skipping 247 matching lines @@
                                function,
                                arguments,
                                kNoArgumentNames));
   ASSERT(result.IsInstance() || result.IsError());
   return result.raw();
 }
 
 
 RawObject* DartLibraryCalls::Equals(const Instance& left,
                                     const Instance& right) {
-  const String& function_name = String::Handle(Symbols::EqualOperator());
   GrowableArray<const Object*> arguments;
   arguments.Add(&right);
   const int kNumArguments = 2;
   const int kNumNamedArguments = 0;
   const Array& kNoArgumentNames = Array::Handle();
   const Function& function = Function::Handle(
       Resolver::ResolveDynamic(left,
-                               function_name,
+                               Symbols::EqualOperatorHandle(),
                                kNumArguments,
                                kNumNamedArguments));
   ASSERT(!function.IsNull());
   const Object& result = Object::Handle(
       DartEntry::InvokeDynamic(left, function, arguments, kNoArgumentNames));
   ASSERT(result.IsInstance() || result.IsError());
   return result.raw();
 }
 
 
@@ skipping 74 matching lines @@
   const String& func_name = String::Handle(Field::GetterName(field_name));
   const Function& func = Function::Handle(cls.LookupDynamicFunction(func_name));
   ASSERT(!func.IsNull());
   GrowableArray<const Object*> arguments;
   const Array& kNoArgumentNames = Array::Handle();
   return DartEntry::InvokeDynamic(port, func, arguments, kNoArgumentNames);
 }
 
 
 }  // namespace dart