Remove -webkit-auto, -webkit-center, -webkit-left, -webkit-right.

sky/engine/core/rendering/RenderBox.cpp

Index: sky/engine/core/rendering/RenderBox.cpp
diff --git a/sky/engine/core/rendering/RenderBox.cpp b/sky/engine/core/rendering/RenderBox.cpp
index 2fbfd0ccfa979c2051a4560190bfe6a0397d5ae4..4dc64d5af2b5b2ce94e368bb31380b405c0f8fe3 100644
--- a/sky/engine/core/rendering/RenderBox.cpp
+++ b/sky/engine/core/rendering/RenderBox.cpp
@@ -1861,9 +1861,8 @@ void RenderBox::computeMarginsForDirection(MarginDirection flowDirection, const
 
     // CSS 2.1: "If both 'margin-left' and 'margin-right' are 'auto', their used values are equal. This horizontally centers the element
     // with respect to the edges of the containing block."
-    const RenderStyle* containingBlockStyle = containingBlock->style();
     if ((marginStartLength.isAuto() && marginEndLength.isAuto() && marginBoxWidth < containerWidth)
-        || (!marginStartLength.isAuto() && !marginEndLength.isAuto() && containingBlockStyle->textAlign() == WEBKIT_CENTER)) {
+        || (!marginStartLength.isAuto() && !marginEndLength.isAuto())) {
         // Other browsers center the margin box for align=center elements so we match them here.
         LayoutUnit centeredMarginBoxStart = std::max<LayoutUnit>(0, (containerWidth - childWidth - marginStartWidth - marginEndWidth) / 2);
         marginStart = centeredMarginBoxStart + marginStartWidth;
@@ -1878,9 +1877,7 @@ void RenderBox::computeMarginsForDirection(MarginDirection flowDirection, const
         return;
     }
 
-    bool pushToEndFromTextAlign = !marginEndLength.isAuto() && ((!containingBlockStyle->isLeftToRightDirection() && containingBlockStyle->textAlign() == WEBKIT_LEFT)
-        || (containingBlockStyle->isLeftToRightDirection() && containingBlockStyle->textAlign() == WEBKIT_RIGHT));
-    if ((marginStartLength.isAuto() && marginBoxWidth < containerWidth) || pushToEndFromTextAlign) {
+    if (marginStartLength.isAuto() && marginBoxWidth < containerWidth) {
         marginEnd = marginEndWidth;
         marginStart = containerWidth - childWidth - marginEnd;
         return;