RFR: 8277428: G1: Move G1STWIsAliveClosure::do_object_b definition back to g1CollectedHeap.cpp [v2]

[Hamlin Li]

> This is a trivial patch to move G1STWIsAliveClosure::do_object_b definition to the right file g1CollectedHeap.cpp.

Hamlin Li 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 three additional commits since the last revision:

 - Merge branch 'master' into move-G1STWIsAliveClosure-do_object_b
 - Inline G1STWIsAliveClosure::do_object_b
 - Initial commit

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/6470/files
  - new: https://git.openjdk.java.net/jdk/pull/6470/files/65bb61c1..1612e833

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=6470&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=6470&range=00-01

  Stats: 41851 lines in 729 files changed: 30266 ins; 5463 del; 6122 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6470.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6470/head:pull/6470

PR: https://git.openjdk.java.net/jdk/pull/6470