Remove the "horizontal-bt" value from -webkit-writing-mode

third_party/WebKit/LayoutTests/css3/flexbox/flex-flow-auto-margins.html

Index: third_party/WebKit/LayoutTests/css3/flexbox/flex-flow-auto-margins.html
diff --git a/third_party/WebKit/LayoutTests/css3/flexbox/flex-flow-auto-margins.html b/third_party/WebKit/LayoutTests/css3/flexbox/flex-flow-auto-margins.html
index 7e7091557de4ec0e57aa73f043c79a197d77b653..96e0a9e09fc564c78bd53a99af14ce18e79c3045 100644
--- a/third_party/WebKit/LayoutTests/css3/flexbox/flex-flow-auto-margins.html
+++ b/third_party/WebKit/LayoutTests/css3/flexbox/flex-flow-auto-margins.html
@@ -28,9 +28,6 @@
 .horizontal-tb {
     -webkit-writing-mode: horizontal-tb;
 }
-.horizontal-bt {
-    -webkit-writing-mode: horizontal-bt;
-}
 .vertical-rl {
     -webkit-writing-mode: vertical-rl;
 }
@@ -113,24 +110,6 @@ var physicalExpectations = {
             'row-reverse': [20, 20, 80, 23],
         }
     },
-    'horizontal-bt': {
-        rtl: {
-            container: physicalContainerSize,
-            flexbox: physicalFlexBoxPosition,
-            column: [20, 20, 80, 73],
-            row: [20, 20, 80, 73],
-            'column-reverse': [20, 20, 80, 23],
-            'row-reverse': [20, 20, 80, 73],
-        },
-        ltr : {
-            container: physicalContainerSize,
-            flexbox: physicalFlexBoxPosition,
-            column: [20, 20, 80, 73],
-            row: [20, 20, 80, 73],
-            'column-reverse': [20, 20, 80, 23],
-            'row-reverse': [20, 20, 80, 73],
-        }
-    },
     'vertical-lr': {
         rtl: {
             container: physicalContainerSize,
@@ -188,24 +167,6 @@ var logicalExpectations = {
             'row-reverse': [20, 20, 118, 73],
         }
     },
-    'horizontal-bt': {
-        rtl: {
-            container: [160, 140],
-            flexbox: [20, 30],
-            column: [20, 20, 22, 47],
-            row: [20, 20, 22, 47],
-            'column-reverse': [20, 20, 22, 47],
-            'row-reverse': [20, 20, 22, 47],
-        },
-        ltr : {
-            container: [160, 140],
-            flexbox: [40, 30],
-            column: [20, 20, 118, 47],
-            row: [20, 20, 118, 47],
-            'column-reverse': [20, 20, 118, 47],
-            'row-reverse': [20, 20, 118, 47],
-        }
-    },
     'vertical-lr': {
         rtl: {
             container: [140, 160],
@@ -244,7 +205,7 @@ var logicalExpectations = {
     }
 }
 
-var writingModes = ['horizontal-tb', 'horizontal-bt', 'vertical-lr', 'vertical-rl'];
+var writingModes = ['horizontal-tb', 'vertical-lr', 'vertical-rl'];
 var flexFlows = ['row', 'column', 'row-reverse', 'column-reverse'];
 var directions = ['ltr', 'rtl'];
 var marginTypes = ['physical', 'logical'];