The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/19ae473e9890bba140facef0127941554a2d5718

commit 19ae473e9890bba140facef0127941554a2d5718
Author: rune <rune@opera.com>
Date: Mon Mar 21 23:53:47 2016

Use LocalStyleChange for text direction changes.

Changing the dir attribute or inserting text content into the document
may affect the CSS direction property through presentation style. The
code traversed and marked the parent elements affected by such changes
but use SubtreeStyleChange which recalculate more style than necessary.
Instead use LocalStyleChange as that will also cause inheritance to
happen appropriately.

R=kojii@chromium.org
BUG= 596509 

Review URL: https://codereview.chromium.org/1817143002

Cr-Commit-Position: refs/heads/master@{#382442}

[add] https://crrev.com/19ae473e9890bba140facef0127941554a2d5718/third_party/WebKit/LayoutTests/fast/dom/dir-auto-insert-text-invalidation-expected.txt
[add] https://crrev.com/19ae473e9890bba140facef0127941554a2d5718/third_party/WebKit/LayoutTests/fast/dom/dir-auto-insert-text-invalidation.html
[modify] https://crrev.com/19ae473e9890bba140facef0127941554a2d5718/third_party/WebKit/Source/core/html/HTMLElement.cpp