Use correct offset when attribute auto is present

Source/core/html/HTMLElement.cpp

Index: Source/core/html/HTMLElement.cpp
diff --git a/Source/core/html/HTMLElement.cpp b/Source/core/html/HTMLElement.cpp
index 7d741fc5342614a92de9e35a0a1acfe0b8eed8c1..2182a2107a85b408f496b9dad3d18e701112a372 100644
--- a/Source/core/html/HTMLElement.cpp
+++ b/Source/core/html/HTMLElement.cpp
@@ -38,6 +38,7 @@
 #include "core/dom/ExceptionCode.h"
 #include "core/dom/NodeTraversal.h"
 #include "core/dom/Text.h"
+#include "core/dom/shadow/ShadowRoot.h"
 #include "core/editing/markup.h"
 #include "core/events/EventListener.h"
 #include "core/events/KeyboardEvent.h"
@@ -637,9 +638,6 @@ static void setHasDirAutoFlagRecursively(Node* firstNode, bool flag, Node* lastN
     Node* node = firstNode->firstChild();
 
     while (node) {
-        if (node->selfOrAncestorHasDirAutoAttribute() == flag)

[esprehn, 2014/06/11 22:56:12]

This means we're going to walk down the subtree even if all the bits are the
same now?

[Habib Virji, 2014/06/12 08:38:53]

Yes that's true. Reason was it was preventing child nodes, to be set and was
returning early. 

-            return;
-
         if (elementAffectsDirectionality(node)) {
             if (node == lastNode)
                 return;
@@ -753,7 +751,9 @@ void HTMLElement::calculateAndAdjustDirectionality()
 {
     Node* strongDirectionalityTextNode;
     TextDirection textDirection = directionality(&strongDirectionalityTextNode);
-    setHasDirAutoFlagRecursively(this, true, strongDirectionalityTextNode);
+    setHasDirAutoFlagRecursively(this, hasDirectionAuto(), strongDirectionalityTextNode);
+    for (ShadowRoot* root = youngestShadowRoot(); root; root = root->olderShadowRoot())
+        setHasDirAutoFlagRecursively(root, hasDirectionAuto());
     if (renderer() && renderer()->style() && renderer()->style()->direction() != textDirection)
         setNeedsStyleRecalc(SubtreeStyleChange);
 }