Could you take look? ;-)

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/9dede133389c377cc53eff4fd50d6a220318d882

commit 9dede133389c377cc53eff4fd50d6a220318d882
Author: xiaochengh <xiaochengh@chromium.org>
Date: Thu Mar 30 03:52:30 2017

Remove useless SpellChecker::clearMisspellingsForMovingParagraphs()

The above mentioned functions removes markers from nodes that will be
removed, which is meaningless because node removal removes marker
eventually.

Hence, this patch removes this function.

BUG= 700217 
TEST=n/a; no behavior change

Review-Url: https://codereview.chromium.org/2781213002
Cr-Commit-Position: refs/heads/master@{#460652}

[modify] https://crrev.com/9dede133389c377cc53eff4fd50d6a220318d882/third_party/WebKit/Source/core/editing/commands/CompositeEditCommand.cpp
[modify] https://crrev.com/9dede133389c377cc53eff4fd50d6a220318d882/third_party/WebKit/Source/core/editing/spellcheck/SpellChecker.cpp
[modify] https://crrev.com/9dede133389c377cc53eff4fd50d6a220318d882/third_party/WebKit/Source/core/editing/spellcheck/SpellChecker.h