RFR: 8257460: Further CompilerOracle cleanup

[Vladimir Kozlov]

On Mon, 30 Nov 2020 22:37:32 GMT, Nils Eliasson <neliasso at openjdk.org> wrote:

> I got some additional feedback on 8256508: "Improve CompileCommand flag" from Claes.
> 
> 1. The _type field in TypedMethodMatcher is not used any more. It is derived from the option.
> 
> 2. The verify_type argument is only used from whitebox API and the check should be pushed out to that code. The check is needed because the option is passed from java as a String and we need to verify that the value type matches the option type.
>  
> 3. The type parameter to TypedMethodMatcher::match isn't used.
>  
> 4. Some code only used for asserts was moved into assert

Good clean up.

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Marked as reviewed by kvn (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/1528