Recommit introducing short external strings.

src/heap.cc

 // Copyright 2011 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 3979 matching lines @@
   }
   if (map == external_string_map()) {
     return external_symbol_map();
   }
   if (map == external_ascii_string_map()) {
     return external_ascii_symbol_map();
   }
   if (map == external_string_with_ascii_data_map()) {
     return external_symbol_with_ascii_data_map();
   }
+  if (map == short_external_string_map()) {
+    return short_external_symbol_map();
+  }
+  if (map == short_external_ascii_string_map()) {
+    return short_external_ascii_symbol_map();
+  }
+  if (map == short_external_string_with_ascii_data_map()) {
+    return short_external_symbol_with_ascii_data_map();
+  }
 
   // No match found.
   return NULL;
 }
 
 
 MaybeObject* Heap::AllocateInternalSymbol(unibrow::CharacterStream* buffer,
                                           int chars,
                                           uint32_t hash_field) {
   ASSERT(chars >= 0);
@@ skipping 2448 matching lines @@
   isolate_->heap()->store_buffer()->Compact();
   isolate_->heap()->store_buffer()->Filter(MemoryChunk::ABOUT_TO_BE_FREED);
   for (chunk = chunks_queued_for_free_; chunk != NULL; chunk = next) {
     next = chunk->next_chunk();
     isolate_->memory_allocator()->Free(chunk);
   }
   chunks_queued_for_free_ = NULL;
 }
 
 } }  // namespace v8::internal