Remove -webkit-line-box-contain implementation.

LayoutTests/platform/mac/fast/block/lineboxcontain/parsing-invalid-expected.txt

Index: LayoutTests/platform/mac/fast/block/lineboxcontain/parsing-invalid-expected.txt
diff --git a/LayoutTests/platform/mac/fast/block/lineboxcontain/parsing-invalid-expected.txt b/LayoutTests/platform/mac/fast/block/lineboxcontain/parsing-invalid-expected.txt
deleted file mode 100644
index fbce1f88e9c298b689b9f8ff0f4a1319db984d1b..0000000000000000000000000000000000000000
--- a/LayoutTests/platform/mac/fast/block/lineboxcontain/parsing-invalid-expected.txt
+++ /dev/null
@@ -1,73 +0,0 @@
-layer at (0,0) size 800x600 clip at (0,0) size 785x600 scrollHeight 1498
-  LayoutView at (0,0) size 800x600
-layer at (0,0) size 785x1498 backgroundClip at (0,0) size 785x600 clip at (0,0) size 785x600 outlineClip at (0,0) size 785x600
-  LayoutBlockFlow {HTML} at (0,0) size 785x1498
-    LayoutBlockFlow {BODY} at (8,8) size 769x1458
-      LayoutBlockFlow (anonymous) at (0,0) size 769x18
-        LayoutText {#text} at (0,0) size 264x18
-          text run at (0,0) width 264: "All of these blocks should look the same."
-layer at (8,58) size 320x256
-  LayoutBlockFlow {DIV} at (0,50) size 320x256 [bgcolor=#00FF00]
-    LayoutInline {SPAN} at (0,0) size 320x64 [color=#008000]
-      LayoutText {#text} at (0,32) size 320x64
-        text run at (0,32) width 320: "xxxxx"
-    LayoutBR {BR} at (320,32) size 0x64
-    LayoutBlockFlow {DIV} at (0,160) size 256x64 [color=#008000]
-      LayoutText {#text} at (0,0) size 256x64
-        text run at (0,0) width 256: "xxxx"
-    LayoutInline {SPAN} at (0,0) size 64x64 [color=#008000]
-      LayoutText {#text} at (256,160) size 64x64
-        text run at (256,160) width 64: "x"
-    LayoutText {#text} at (0,0) size 0x0
-layer at (8,346) size 320x256 backgroundClip at (8,346) size 320x254 clip at (8,346) size 320x254 outlineClip at (0,0) size 785x600
-  LayoutBlockFlow {DIV} at (0,338) size 320x256 [bgcolor=#00FF00]
-    LayoutInline {SPAN} at (0,0) size 320x64 [color=#008000]
-      LayoutText {#text} at (0,32) size 320x64
-        text run at (0,32) width 320: "xxxxx"
-    LayoutBR {BR} at (320,32) size 0x64
-    LayoutBlockFlow {DIV} at (0,160) size 256x64 [color=#008000]
-      LayoutText {#text} at (0,0) size 256x64
-        text run at (0,0) width 256: "xxxx"
-    LayoutInline {SPAN} at (0,0) size 64x64 [color=#008000]
-      LayoutText {#text} at (256,160) size 64x64
-        text run at (256,160) width 64: "x"
-    LayoutText {#text} at (0,0) size 0x0
-layer at (8,634) size 320x256 backgroundClip at (0,0) size 0x0 clip at (0,0) size 0x0 outlineClip at (0,0) size 785x600
-  LayoutBlockFlow {DIV} at (0,626) size 320x256 [bgcolor=#00FF00]
-    LayoutInline {SPAN} at (0,0) size 320x64 [color=#008000]
-      LayoutText {#text} at (0,32) size 320x64
-        text run at (0,32) width 320: "xxxxx"
-    LayoutBR {BR} at (320,32) size 0x64
-    LayoutBlockFlow {DIV} at (0,160) size 256x64 [color=#008000]
-      LayoutText {#text} at (0,0) size 256x64
-        text run at (0,0) width 256: "xxxx"
-    LayoutInline {SPAN} at (0,0) size 64x64 [color=#008000]
-      LayoutText {#text} at (256,160) size 64x64
-        text run at (256,160) width 64: "x"
-    LayoutText {#text} at (0,0) size 0x0
-layer at (8,922) size 320x256 backgroundClip at (0,0) size 0x0 clip at (0,0) size 0x0 outlineClip at (0,0) size 785x600
-  LayoutBlockFlow {DIV} at (0,914) size 320x256 [bgcolor=#00FF00]
-    LayoutInline {SPAN} at (0,0) size 320x64 [color=#008000]
-      LayoutText {#text} at (0,32) size 320x64
-        text run at (0,32) width 320: "xxxxx"
-    LayoutBR {BR} at (320,32) size 0x64
-    LayoutBlockFlow {DIV} at (0,160) size 256x64 [color=#008000]
-      LayoutText {#text} at (0,0) size 256x64
-        text run at (0,0) width 256: "xxxx"
-    LayoutInline {SPAN} at (0,0) size 64x64 [color=#008000]
-      LayoutText {#text} at (256,160) size 64x64
-        text run at (256,160) width 64: "x"
-    LayoutText {#text} at (0,0) size 0x0
-layer at (8,1210) size 320x256 backgroundClip at (0,0) size 0x0 clip at (0,0) size 0x0 outlineClip at (0,0) size 785x600
-  LayoutBlockFlow {DIV} at (0,1202) size 320x256 [bgcolor=#00FF00]
-    LayoutInline {SPAN} at (0,0) size 320x64 [color=#008000]
-      LayoutText {#text} at (0,32) size 320x64
-        text run at (0,32) width 320: "xxxxx"
-    LayoutBR {BR} at (320,32) size 0x64
-    LayoutBlockFlow {DIV} at (0,160) size 256x64 [color=#008000]
-      LayoutText {#text} at (0,0) size 256x64
-        text run at (0,0) width 256: "xxxx"
-    LayoutInline {SPAN} at (0,0) size 64x64 [color=#008000]
-      LayoutText {#text} at (256,160) size 64x64
-        text run at (256,160) width 64: "x"
-    LayoutText {#text} at (0,0) size 0x0