Correcting a bogus assert outdated since r9295.

src/objects-inl.h

 // 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 2318 matching lines @@
   return SizeFor(length());
 }
 
 
 String* SlicedString::parent() {
   return String::cast(READ_FIELD(this, kParentOffset));
 }
 
 
 void SlicedString::set_parent(String* parent) {
-  ASSERT(parent->IsSeqString());
+  ASSERT(parent->IsSeqString() || parent->IsExternalString());
   WRITE_FIELD(this, kParentOffset, parent);
 }
 
 
 SMI_ACCESSORS(SlicedString, offset, kOffsetOffset)
 
 
 String* ConsString::first() {
   return String::cast(READ_FIELD(this, kFirstOffset));
 }
@@ skipping 2332 matching lines @@
 #undef WRITE_INT_FIELD
 #undef READ_SHORT_FIELD
 #undef WRITE_SHORT_FIELD
 #undef READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_INL_H_