Consider text alignment and direction when computing the left offset for horizontal writing modes.

Source/core/rendering/RenderText.cpp

Index: Source/core/rendering/RenderText.cpp
diff --git a/Source/core/rendering/RenderText.cpp b/Source/core/rendering/RenderText.cpp
index 70f35a32a4a9fb0c011c3016db1b2e8d5e004d1f..678506cbf436974b5311a5a4458d75997e01e069 100644
--- a/Source/core/rendering/RenderText.cpp
+++ b/Source/core/rendering/RenderText.cpp
@@ -692,22 +692,18 @@ LayoutRect RenderText::localCaretRect(InlineBox* inlineBox, int caretOffset, Lay
     rightEdge = max<float>(cb->logicalWidth(), rootRight);
 
     bool rightAligned = false;
-    switch (cbStyle->textAlign()) {
+    switch (simplifiedTextAlign(cbStyle->textAlign())) {
     case RIGHT:
-    case WEBKIT_RIGHT:
         rightAligned = true;
         break;
     case LEFT:
-    case WEBKIT_LEFT:
     case CENTER:
-    case WEBKIT_CENTER:
         break;
     case JUSTIFY:
-    case TASTART:
         rightAligned = !cbStyle->isLeftToRightDirection();
         break;
-    case TAEND:
-        rightAligned = cbStyle->isLeftToRightDirection();
+    default:
+        ASSERT_NOT_REACHED();
         break;
     }