Remove the different length string types...

src/stub-cache.h

 // Copyright 2006-2008 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 208 matching lines @@
   static Entry primary_[];
   static Entry secondary_[];
 
   // Computes the hashed offsets for primary and secondary caches.
   static int PrimaryOffset(String* name, Code::Flags flags, Map* map) {
     // This works well because the heap object tag size and the hash
     // shift are equal.  Shifting down the length field to get the
     // hash code would effectively throw away two bits of the hash
     // code.
     ASSERT(kHeapObjectTagSize == String::kHashShift);
-    // Compute the hash of the name (use entire length field).
+    // Compute the hash of the name (use entire hash field).
     ASSERT(name->HasHashCode());
-    uint32_t field = name->length_field();
+    uint32_t field = name->hash_field();
     // Using only the low bits in 64-bit mode is unlikely to increase the
     // risk of collision even if the heap is spread over an area larger than
     // 4Gb (and not at all if it isn't).
     uint32_t map_low32bits =
         static_cast<uint32_t>(reinterpret_cast<uintptr_t>(map));
     // We always set the in_loop bit to zero when generating the lookup code
     // so do it here too so the hash codes match.
     uint32_t iflags =
         (static_cast<uint32_t>(flags) & ~Code::kFlagsNotUsedInLookup);
     // Base the offset on a simple combination of name, flags, and map.
@@ skipping 326 matching lines @@
   Object* CompileConstructStub(SharedFunctionInfo* shared);
 
  private:
   Object* GetCode();
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_STUB_CACHE_H_