[css-flexbox] Fix handling of borders/padding for abspos items

third_party/WebKit/Source/core/layout/LayoutFlexibleBox.cpp

Index: third_party/WebKit/Source/core/layout/LayoutFlexibleBox.cpp
diff --git a/third_party/WebKit/Source/core/layout/LayoutFlexibleBox.cpp b/third_party/WebKit/Source/core/layout/LayoutFlexibleBox.cpp
index bb3cc3f80f4304244cbad146151cff70c69bf2ee..c278009f3d03f5ce51fe4cc9f5032c8fe3651b5a 100644
--- a/third_party/WebKit/Source/core/layout/LayoutFlexibleBox.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutFlexibleBox.cpp
@@ -1395,16 +1395,14 @@ LayoutUnit LayoutFlexibleBox::staticCrossAxisPositionForPositionedChild(const La
 
 LayoutUnit LayoutFlexibleBox::staticInlinePositionForPositionedChild(const LayoutBox& child)
 {
-    LayoutUnit staticInlineOffset = flowAwareBorderStart() + flowAwarePaddingStart();
-    return staticInlineOffset + (isColumnFlow() ?
+    return startOffsetForContent() + (isColumnFlow() ?
         staticCrossAxisPositionForPositionedChild(child) :
         staticMainAxisPositionForPositionedChild(child));
 }
 
 LayoutUnit LayoutFlexibleBox::staticBlockPositionForPositionedChild(const LayoutBox& child)
 {
-    LayoutUnit staticBlockOffset = flowAwareBorderBefore() + flowAwarePaddingBefore();
-    return staticBlockOffset + (isColumnFlow() ?
+    return borderAndPaddingBefore() + (isColumnFlow() ?
         staticMainAxisPositionForPositionedChild(child) :
         staticCrossAxisPositionForPositionedChild(child));
 }