Revert "Changing string length field type from int to SMI."

src/objects.h

 // Copyright 2006-2009 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 4045 matching lines @@
   // Dispatched behavior.
   void StringShortPrint(StringStream* accumulator);
 #ifdef DEBUG
   void StringPrint();
   void StringVerify();
 #endif
   inline bool IsFlat();
 
   // Layout description.
   static const int kLengthOffset = HeapObject::kHeaderSize;
-  static const int kHashFieldOffset = kLengthOffset + kPointerSize;
+  static const int kHashFieldOffset = kLengthOffset + kIntSize;
   static const int kSize = kHashFieldOffset + kIntSize;
   // Notice: kSize is not pointer-size aligned if pointers are 64-bit.
 
   // Maximum number of characters to consider when trying to convert a string
   // value into an array index.
   static const int kMaxArrayIndexSize = 10;
 
   // Max ascii char code.
   static const int kMaxAsciiCharCode = unibrow::Utf8::kMaxOneByteChar;
   static const unsigned kMaxAsciiCharCodeU = unibrow::Utf8::kMaxOneByteChar;
@@ skipping 1056 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_