RFR: 8264872: Dependencies: Migrate to PerfData counters [v2]

[Vladimir Ivanov]

> Migrate performance counters on `Dependencies` (`deps_find_witness_*`) to `PerfData`.
> 
> Testing:
> - [x] hs-tier1 - hs-tier2

Vladimir Ivanov has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains 10 additional commits since the last revision:

 - Merge branch 'master' into 8264872.perf_counters
 - Formatting
 - CountingClassHierarchyIterator
 - Migrate to PerfData
 - Depenencies perf counters
 - KlassDepChange::involves_context
 - KlassDepChange::_new_type
 - Dependencies::is_concrete_method
 - Dependencies::verify_method_context
 - int -> uint

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/3386/files
  - new: https://git.openjdk.java.net/jdk/pull/3386/files/3567e0f0..a810a10e

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=3386&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=3386&range=00-01

  Stats: 5774 lines in 162 files changed: 4269 ins; 1012 del; 493 mod
  Patch: https://git.openjdk.java.net/jdk/pull/3386.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/3386/head:pull/3386

PR: https://git.openjdk.java.net/jdk/pull/3386