Review Request: JDK-8176815: Remove StackFramePermission and use RuntimePermission for stack walking

[Mandy Chung]

StackWalker::getInstance is currently specified to check for StackFramePermission("retainClassReference“) due to an early review feedback .  Given it has only one target, it’s overkill to define a specific permission type for stack walking use.   This patch proposes to replace the StackWalker permission check with RuntimePermission("getStackWalkerWithClassReference”) and remove StackFramePermission class.

http://cr.openjdk.java.net/~mchung/jdk9/webrevs/8176815/webrev.00/

Mandy