RFR: 8273372: More precise ResourceMark in ReferenceProcessor [v2]

[Albert Mingkun Yang]

> Simple change of moving `ResourceMark` closer to where it is actually required.
> 
> Test: tier1-6

Albert Mingkun Yang has updated the pull request incrementally with one additional commit since the last revision:

  remove tracemsg

-------------

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/5375/files
  - new: https://git.openjdk.java.net/jdk/pull/5375/files/c6c9335e..ec25f9e9

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=5375&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=5375&range=00-01

  Stats: 12 lines in 2 files changed: 0 ins; 12 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/5375.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/5375/head:pull/5375

PR: https://git.openjdk.java.net/jdk/pull/5375