RFR(XS): 8140239: Fix product build after "8132168: Support IdealGraphVisualizer in optimized build"

[Lindenmaier, Goetz]

Hi,

After "8132168: Support IdealGraphVisualizer in optimized build" the product build is broken:
compilerDirectives.cpp:181: error: 'PrintIdealGraphLevel' was not declared in this scope

8132168 changes the flag from 'develop' to 'notproduct'. 'Notproduct' does not define
"const intx PrintIdealGraphLevel = 0;" in the product build, as 'develop' did.

I fixed this by wrapping the flag with NOT_PRODUCT:
http://cr.openjdk.java.net/~goetz/webrevs/8140239-prodBld/webrev.00/

Please review this change.  I please need a sponsor.

Best regards,
  Goetz.




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