RFR: 8269115: WebView paste event contains old data [v5]

[Jay Bhaskar]

> Issue: The DataObject uses m_availMimeTypes as Vector of strings, and appending mime types in pasteboard operation like setPlainText, Hence it will append duplicate mime types in m_availMimeTypes , in this case the length clipboardData.types would be wrong, and duplicates data would be copied to clipboard target.
> Solution: Use ListHashSet data Structure instead of Vector for m_availMimeTypes.

Jay Bhaskar has updated the pull request incrementally with two additional commits since the last revision:

 - formating change
 - formating change

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

Changes:
  - all: https://git.openjdk.java.net/jfx/pull/729/files
  - new: https://git.openjdk.java.net/jfx/pull/729/files/dded44a5..aa75ea4e

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jfx&pr=729&range=04
 - incr: https://webrevs.openjdk.java.net/?repo=jfx&pr=729&range=03-04

  Stats: 7 lines in 1 file changed: 0 ins; 2 del; 5 mod
  Patch: https://git.openjdk.java.net/jfx/pull/729.diff
  Fetch: git fetch https://git.openjdk.java.net/jfx pull/729/head:pull/729

PR: https://git.openjdk.java.net/jfx/pull/729