[LayoutNG] Rebaseline image failure about line gap selection.

At the discussion on the painting line gap patch, we decided not to paint
selection gap:
https://chromium-review.googlesource.com/c/chromium/src/+/989519/7/third_party/blink/renderer/core/paint/ng/ng_text_fragment_painter.cc#120

This patch rebaselines image failures not painting such selection
following the decision.

Bug: 708452
Cq-Include-Trybots: master.tryserver.chromium.linux:linux_layout_tests_layout_ng
Change-Id: Idb2452d50da896081265a6b9628912c92c60d6f4
Reviewed-on: https://chromium-review.googlesource.com/1068577Reviewed-by: Yoshifumi Inoue <yosin@chromium.org>
Commit-Queue: Yoichi Osato <yoichio@chromium.org>
Cr-Commit-Position: refs/heads/master@{#561003}

third_party/WebKit/LayoutTests/flag-specific/enable-blink-features=LayoutNG/editing/selection/selection-button-text-expected.txt

+layer at (0,0) size 800x600
+  LayoutView at (0,0) size 800x600
+layer at (0,0) size 800x144
+  LayoutNGBlockFlow {HTML} at (0,0) size 800x144
+    LayoutNGBlockFlow {BODY} at (8,16) size 784x120
+      LayoutNGBlockFlow {P} at (0,0) size 784x20
+        LayoutText {#text} at (0,0) size 554x19
+          text run at (0,0) width 554: "To PASS this test case the text of the button label should not be selected in the selection."
+      LayoutNGBlockFlow {DIV} at (0,36) size 784x84
+        LayoutNGBlockFlow (anonymous) at (0,0) size 784x42
+          LayoutText {#text} at (0,0) size 49x19
+            text run at (0,0) width 49: "Buttons"
+          LayoutBR {BR} at (49,0) size 0x0
+          LayoutText {#text} at (0,21) size 59x19
+            text run at (0,21) width 59: "with text "
+          LayoutButton {INPUT} at (59,20) size 62x22 [bgcolor=#C0C0C0] [border: (2px outset #C0C0C0)]
+            LayoutNGBlockFlow (anonymous) at (8,3) size 46x16
+              LayoutText {#text} at (0,0) size 46x16
+                text run at (0,0) width 46: "too little"
+          LayoutText {#text} at (121,21) size 55x19
+            text run at (121,21) width 55: " too little"
+        LayoutNGBlockFlow {DIV} at (0,42) size 784x22
+          LayoutText {#text} at (0,1) size 54x19
+            text run at (0,1) width 54: "and text "
+          LayoutButton {INPUT} at (54,0) size 70x22 [bgcolor=#C0C0C0] [border: (2px outset #C0C0C0)]
+            LayoutNGBlockFlow (anonymous) at (8,3) size 54x16
+              LayoutText {#text} at (0,0) size 54x16
+                text run at (0,0) width 54: "too much"
+          LayoutText {#text} at (124,1) size 63x19
+            text run at (124,1) width 63: " too much"
+        LayoutNGBlockFlow (anonymous) at (0,64) size 784x20
+          LayoutText {#text} at (0,0) size 244x19
+            text run at (0,0) width 244: "Should not be selected in the selection."
+selection start: position 0 of child 0 {#text} of child 1 {P} of body
+selection end:   position 41 of child 6 {#text} of child 3 {DIV} of body

third_party/WebKit/LayoutTests/flag-specific/enable-blink-features=LayoutNG/fast/dynamic/selection-highlight-adjust-expected.txt

+layer at (0,0) size 800x600
+  LayoutView at (0,0) size 800x600
+layer at (0,0) size 800x165
+  LayoutNGBlockFlow {HTML} at (0,0) size 800x165
+    LayoutNGBlockFlow {BODY} at (8,16) size 784x141
+      LayoutNGBlockFlow {P} at (0,0) size 784x40
+        LayoutText {#text} at (0,0) size 172x19
+          text run at (0,0) width 172: "This is a regression test for "
+        LayoutInline {I} at (0,0) size 783x39
+          LayoutInline {A} at (0,0) size 347x19 [color=#0000EE]
+            LayoutText {#text} at (172,0) size 347x19
+              text run at (172,0) width 347: "http://bugzilla.opendarwin.org/show_bug.cgi?id=8835"
+          LayoutText {#text} at (519,0) size 783x39
+            text run at (519,0) width 264: " REGRESSION: Line moves but selection"
+            text run at (0,20) width 138: "highlight stays behind"
+        LayoutText {#text} at (138,20) size 4x19
+          text run at (138,20) width 4: "."
+      LayoutNGBlockFlow {DIV} at (0,66) size 784x75
+        LayoutImage {IMG} at (0,0) size 0x30
+        LayoutBR {BR} at (0,15) size 0x0
+        LayoutBR {BR} at (0,35) size 0x0
+        LayoutInline {SPAN} at (0,0) size 309x19
+          LayoutText {#text} at (0,55) size 309x19
+            text run at (0,55) width 309: "The highlight should be on this line, not above it."
+        LayoutText {#text} at (0,0) size 0x0
+        LayoutBR {BR} at (309,55) size 0x0
+layer at (8,72) size 784x2 clip at (0,0) size 0x0
+  LayoutNGBlockFlow {HR} at (0,56) size 784x2 [border: (1px inset #EEEEEE)]
+selection start: position 0 of child 0 {#text} of child 6 {SPAN} of child 5 {DIV} of body
+selection end:   position 51 of child 0 {#text} of child 6 {SPAN} of child 5 {DIV} of body