remove IsOneByteConvertible

src/api.cc

 // Copyright 2012 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 4043 matching lines @@
   if (IsDeadCheck(str->GetIsolate(), "v8::String::Length()")) return 0;
   return str->length();
 }
 
 
 bool String::IsOneByte() const {
   i::Handle<i::String> str = Utils::OpenHandle(this);
   if (IsDeadCheck(str->GetIsolate(), "v8::String::IsOneByte()")) {
     return false;
   }
-  return str->IsOneByteConvertible();
+  return str->HasOnlyOneByteChars();
 }
 
 
 class Utf8LengthHelper : public i::AllStatic {
  public:
   enum State {
     kEndsWithLeadingSurrogate = 1 << 0,
     kStartsWithTrailingSurrogate = 1 << 1,
     kLeftmostEdgeIsCalculated = 1 << 2,
     kRightmostEdgeIsCalculated = 1 << 3,
@@ skipping 3404 matching lines @@
 
   v->VisitPointers(blocks_.first(), first_block_limit_);
 
   for (int i = 1; i < blocks_.length(); i++) {
     v->VisitPointers(blocks_[i], &blocks_[i][kHandleBlockSize]);
   }
 }
 
 
 } }  // namespace v8::internal