[LayoutNG] Rebaseline ellipsis in inline-block to NG behavior

Blink is the only engine that truncates text inside of an
inline block for 'text-overflow: ellipsis', and these two
tests are for the behavior.

The spec says atomic inline is truncated as a whole or not,
and all other 3 impls follow that. LayoutNG matches to it.

TBR=atotic@chromium.org
NOTRY=true

Bug: 636993
Cq-Include-Trybots: luci.chromium.try:linux_layout_tests_layout_ng
Change-Id: Iae29eaf66f23d3eb120b215606a5b1e5e020bfbf
Reviewed-on: https://chromium-review.googlesource.com/1107529
Commit-Queue: Koji Ishii <kojii@chromium.org>
Reviewed-by: Koji Ishii <kojii@chromium.org>
Cr-Commit-Position: refs/heads/master@{#568818}

third_party/WebKit/LayoutTests/FlagExpectations/enable-blink-features=LayoutNG

@@ -599,8 +599,6 @@ crbug.com/591099 fast/text/hide-atomic-inlines-after-ellipsis.html [ Failure ]
 crbug.com/796943 fast/text/international/shape-across-elements-simple.html [ Pass ]
 crbug.com/591099 fast/text/international/text-combine-image-test.html [ Failure ]
 crbug.com/591099 fast/text/orientation-sideways.html [ Failure ]
-crbug.com/591099 fast/text/place-ellipsis-in-inline-block-adjacent-float-2.html [ Failure ]
-crbug.com/591099 fast/text/place-ellipsis-in-inline-block-adjacent-float.html [ Failure ]
 crbug.com/591099 fast/text/text-combine-first-line-crash.html [ Crash ]
 crbug.com/591099 fast/text/unicode-fallback-font.html [ Failure ]
 crbug.com/591099 fast/text/whitespace/018.html [ Failure ]