REGRESSION: ASSERTION FAILED: obj->isRenderInline() || obj == this, Bad cast in WebCo...

REGRESSION: ASSERTION FAILED: obj->isRenderInline() || obj == this, Bad cast in WebCore::RenderBlock::createLineBoxes
https://bugs.webkit.org/show_bug.cgi?id=110622

Reviewed by David Hyatt.

Source/WebCore:

Merge https://chromium.googlesource.com/chromium/blink/+/998ad358eed702b873dd54697b3fa3f952e0feb7

Inserting an element before the fullscreened element could crash if it caused a containing inline to be split,
since the splitting logic doesn't expect the fullscreened element to be wrapped in a RenderFullScreen. This patch changes
inline splitting to be aware of RenderFullScreen.

Test: fullscreen/full-screen-inline-split-crash.html

* rendering/RenderInline.cpp:
(WebCore::RenderInline::splitInlines):

LayoutTests:

Add a regression test.

* fullscreen/full-screen-inline-split-crash-expected.txt: Added.
* fullscreen/full-screen-inline-split-crash.html: Added.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@150531 268f45cc-cd09-0410-ab3c-d52691b4dbfc