Replaced usages of WritingMode to use inline utility functions instead

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

Index: third_party/WebKit/Source/core/layout/LayoutVTTCue.cpp
diff --git a/third_party/WebKit/Source/core/layout/LayoutVTTCue.cpp b/third_party/WebKit/Source/core/layout/LayoutVTTCue.cpp
index 891c8ffaec02da61ba843f9ae80a0a0492fc4731..d0984f1e91905b24960f2da9fef484c028cb0b93 100644
--- a/third_party/WebKit/Source/core/layout/LayoutVTTCue.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutVTTCue.cpp
@@ -85,7 +85,7 @@ LayoutUnit SnapToLinesLayouter::computeInitialPositionAdjustment(
 
   WritingMode writingMode = m_cueBox.style()->getWritingMode();
   // 8. Vertical Growing Left: Add one to line then negate it.
-  if (writingMode == RightToLeftWritingMode)
+  if (isFlippedBlocksWritingMode(writingMode))
     linePosition = -(linePosition + 1);
 
   // 9. Let position be the result of multiplying step and line offset.
@@ -93,7 +93,7 @@ LayoutUnit SnapToLinesLayouter::computeInitialPositionAdjustment(
 
   // 10. Vertical Growing Left: Decrease position by the width of the
   // bounding box of the boxes in boxes, then increase position by step.
-  if (writingMode == RightToLeftWritingMode) {
+  if (isFlippedBlocksWritingMode(writingMode)) {
     position -= m_cueBox.size().width();
     position += step;
   }