text-align-last only affect to the last line when text-align is justify.

Source/core/rendering/RenderBlockLineLayout.cpp

Index: Source/core/rendering/RenderBlockLineLayout.cpp
diff --git a/Source/core/rendering/RenderBlockLineLayout.cpp b/Source/core/rendering/RenderBlockLineLayout.cpp
index e244d5419f4f10856babf460eb66c39debcabaf9..9f4ead1e58e89f0364a7821c8f25d19736ae1695 100644
--- a/Source/core/rendering/RenderBlockLineLayout.cpp
+++ b/Source/core/rendering/RenderBlockLineLayout.cpp
@@ -319,6 +319,9 @@ ETextAlign RenderBlockFlow::textAlignmentForLine(bool endsWithSoftBreak) const
     if (!RuntimeEnabledFeatures::css3TextEnabled())
         return (alignment == JUSTIFY) ? TASTART : alignment;
 
+    if (alignment != JUSTIFY)
+        return alignment;
+
     TextAlignLast alignmentLast = style()->textAlignLast();
     switch (alignmentLast) {
     case TextAlignLastStart:
@@ -334,8 +337,6 @@ ETextAlign RenderBlockFlow::textAlignmentForLine(bool endsWithSoftBreak) const
     case TextAlignLastJustify:
         return JUSTIFY;
     case TextAlignLastAuto:
-        if (alignment != JUSTIFY)
-            return alignment;
         if (style()->textJustify() == TextJustifyDistribute)
             return JUSTIFY;
         return TASTART;