Add read only handles for the following predefined symbols

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/bigint_operations.h"
@@ skipping 1232 matching lines @@
         isolate()->store_buffer()->AddPointer(ptr);
       }
     }
   }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(StoreBufferObjectPointerVisitor);
 };
 
 
+bool Object::IsPredefinedHandle() const {
+  return Symbols::IsPredefinedHandle(reinterpret_cast<uword>(this));
+}
+
+
 RawObject* Object::Clone(const Object& src, Heap::Space space) {
   const Class& cls = Class::Handle(src.clazz());
   intptr_t size = src.raw()->Size();
   RawObject* raw_obj = Object::Allocate(cls.id(), size, space);
   NoGCScope no_gc;
   memmove(raw_obj->ptr(), src.raw()->ptr(), size);
   if (space == Heap::kOld) {
     StoreBufferObjectPointerVisitor visitor(Isolate::Current());
     raw_obj->VisitPointers(&visitor);
   }
@@ skipping 2125 matching lines @@
 }
 
 
 void Function::set_is_inlinable(bool value) const {
   set_kind_tag(InlinableBit::update(value, raw_ptr()->kind_tag_));
 }
 
 
 bool Function::IsInlineable() const {
   // '==' call is handled specially.
-  const String& equality_name = String::Handle(Symbols::EqualOperator());
   return InlinableBit::decode(raw_ptr()->kind_tag_) &&
          HasCode() &&
-         name() != equality_name.raw();
+         name() != Symbols::EqualOperator();
 }
 
 
 intptr_t Function::NumParameters() const {
   return num_fixed_parameters() + NumOptionalParameters();
 }
 
 
 intptr_t Function::NumImplicitParameters() const {
   if (kind() == RawFunction::kConstructor) {
@@ skipping 8887 matching lines @@
   }
   return result.raw();
 }
 
 
 const char* WeakProperty::ToCString() const {
   return "_WeakProperty";
 }
 
 }  // namespace dart