RFR: 8267089: Use typedef KVHashtable for ID2KlassTable

[Xin Liu]

On Thu, 13 May 2021 07:08:11 GMT, Yi Yang <yyang at openjdk.org> wrote:

> While backporting some stuff to jdk11, I noticed main functionalities of ID2KlassTable have been removed afterJDK-8213587, it seems that we can use a simple typedef KVHashtable instead.

This is nice! It's not "seems" , we can use typedef. 

Another nit you can do along with this PR.  move * to its class. 


  ID2KlassTable* table() {
    return &_id2klass_table;
  }

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PR: https://git.openjdk.java.net/jdk/pull/4007