RFR: 8296590: StraightLineTest fails always on Linux and sometimes on other platforms [v2]

[Jay Bhaskar]

> Issue: The test fails, in case snapshot is taken before web view finish web content load
> Solution: Introduce a sleep , before taking snapshot of web view , to test straight line

Jay Bhaskar has updated the pull request incrementally with one additional commit since the last revision:

  On Linux , text is warpping , so add style nowrap

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Changes:
  - all: https://git.openjdk.org/jfx/pull/1115/files
  - new: https://git.openjdk.org/jfx/pull/1115/files/ae788651..87f672e5

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jfx&pr=1115&range=01
 - incr: https://webrevs.openjdk.org/?repo=jfx&pr=1115&range=00-01

  Stats: 2 lines in 1 file changed: 1 ins; 1 del; 0 mod
  Patch: https://git.openjdk.org/jfx/pull/1115.diff
  Fetch: git fetch https://git.openjdk.org/jfx.git pull/1115/head:pull/1115

PR: https://git.openjdk.org/jfx/pull/1115