RFR: 8268647: Generation::expand_and_allocate has unused "parallel" argument [v2]

[Kim Barrett]

> Please review this simplification of the Generation class and the classes
> derived from it.  There are no callers of expand_and_allocate that pass the
> third argument explicitly, so its value is always the default (false) value.
> 
> This change removes the argument and updates the two implementations of this
> virtual function accordingly.
> 
> [The "parallel" argument is probably a leftover from CMS support.]
> 
> Testing:
> mach5 tier1.

Kim Barrett has updated the pull request incrementally with one additional commit since the last revision:

  tweak whitespace

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/4485/files
  - new: https://git.openjdk.java.net/jdk/pull/4485/files/9de6004a..a7d107a5

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=4485&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=4485&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/4485.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/4485/head:pull/4485

PR: https://git.openjdk.java.net/jdk/pull/4485