Fix compilation error in non-debug mode.

src/regexp-macro-assembler-ia32.cc

 // Copyright 2008-2009 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 1091 matching lines @@
 
 
 const byte* RegExpMacroAssemblerIA32::StringCharacterPosition(String* subject,
                                                               int start_index) {
   // Not just flat, but ultra flat.
   ASSERT(subject->IsExternalString() || subject->IsSeqString());
   ASSERT(start_index >= 0);
   ASSERT(start_index <= subject->length());
   if (StringShape(subject).IsAsciiRepresentation()) {
     const byte* address;
-    if (subject->IsExternalAsciiString()) {
+    if (StringShape(subject).IsExternal()) {
       const char* data = ExternalAsciiString::cast(subject)->resource()->data();
       address = reinterpret_cast<const byte*>(data);
     } else {
       ASSERT(subject->IsSeqAsciiString());
       char* data = SeqAsciiString::cast(subject)->GetChars();
       address = reinterpret_cast<const byte*>(data);
     }
     return address + start_index;
   }
   const uc16* data;
-  if (subject->IsExternalTwoByteString()) {
+  if (StringShape(subject).IsExternal()) {
     data = ExternalTwoByteString::cast(subject)->resource()->data();
   } else {
     ASSERT(subject->IsSeqTwoByteString());
     data = SeqTwoByteString::cast(subject)->GetChars();
   }
   return reinterpret_cast<const byte*>(data + start_index);
 }
 
 
 int RegExpMacroAssemblerIA32::CheckStackGuardState(Address* return_address,
@@ skipping 242 matching lines @@
 
 
 void RegExpMacroAssemblerIA32::LoadConstantBufferAddress(Register reg,
                                                          ArraySlice* buffer) {
   __ mov(reg, buffer->array());
   __ add(Operand(reg), Immediate(buffer->base_offset()));
 }
 
 #undef __
 }}  // namespace v8::internal