RFR: 8276661: (fs) UserDefinedFileAttributeView no longer works with long path (win) [v6]

[Brian Burkhalter]

> Please consider this change which uses a new method `WindowsPath::getPathWithPrefixForWin32Calls`.

Brian Burkhalter has updated the pull request incrementally with one additional commit since the last revision:

  8276661: Ensure GetFullPathName() is used

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/6435/files
  - new: https://git.openjdk.java.net/jdk/pull/6435/files/5703b012..3567e5ac

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=6435&range=05
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=6435&range=04-05

  Stats: 13 lines in 2 files changed: 0 ins; 4 del; 9 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6435.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6435/head:pull/6435

PR: https://git.openjdk.java.net/jdk/pull/6435