RFR: 8302684 : Cherry-pick WebKit 615.1 stabilization fixes (2)

[Hima Bindu Meda]

Stabilization fixes from Webkitgtk-2.38.5.
Verified drt and unit tests. No issues observed.

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Commit messages:
 - white space correction
 - Cherry-pick stabilisation fixes till 2.38.5

Changes: https://git.openjdk.org/jfx/pull/1038/files
 Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=1038&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8302684
  Stats: 34 lines in 14 files changed: 18 ins; 1 del; 15 mod
  Patch: https://git.openjdk.org/jfx/pull/1038.diff
  Fetch: git fetch https://git.openjdk.org/jfx pull/1038/head:pull/1038

PR: https://git.openjdk.org/jfx/pull/1038