Hide heap methods where possible.

src/heap.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 4857 matching lines @@
   old_data_space_->Verify(&no_dirty_regions_visitor);
   code_space_->Verify(&no_dirty_regions_visitor);
   cell_space_->Verify(&no_dirty_regions_visitor);
   property_cell_space_->Verify(&no_dirty_regions_visitor);
 
   lo_space_->Verify();
 }
 #endif
 
 
-MaybeObject* Heap::InternalizeUtf8String(Vector<const char> string) {
-  Utf8StringKey key(string, HashSeed());
-  return InternalizeStringWithKey(&key);
-}
-
-
 MaybeObject* Heap::InternalizeString(String* string) {
   if (string->IsInternalizedString()) return string;
   Object* result = NULL;
   Object* new_table;
   { MaybeObject* maybe_new_table =
         string_table()->LookupString(string, &result);
     if (!maybe_new_table->ToObject(&new_table)) return maybe_new_table;
   }
   // Can't use set_string_table because StringTable::cast knows that
   // StringTable is a singleton and checks for identity.
@@ skipping 1843 matching lines @@
       static_cast<int>(object_sizes_last_time_[index]));
   CODE_AGE_LIST_COMPLETE(ADJUST_LAST_TIME_OBJECT_COUNT)
 #undef ADJUST_LAST_TIME_OBJECT_COUNT
 
   OS::MemCopy(object_counts_last_time_, object_counts_, sizeof(object_counts_));
   OS::MemCopy(object_sizes_last_time_, object_sizes_, sizeof(object_sizes_));
   ClearObjectStats();
 }
 
 } }  // namespace v8::internal