RFR: 8271884: G1CH::_expand_heap_after_alloc_failure is no longer needed [v3]

[Ivan Walulya]

> Hi,
> 
> Please review this change to remove _expand_heap_after_alloc_failure. Checks for old_is_full(), survivor_is_full(), and G1CollectedHeap::has_more_regions() should eliminate repeated expansion attempts.
> 
> Testing; tier 1

Ivan Walulya has updated the pull request incrementally with one additional commit since the last revision:

  add comments

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/5030/files
  - new: https://git.openjdk.java.net/jdk/pull/5030/files/096e815f..aa72921e

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=5030&range=02
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=5030&range=01-02

  Stats: 6 lines in 1 file changed: 6 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/5030.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/5030/head:pull/5030

PR: https://git.openjdk.java.net/jdk/pull/5030